assistant: You've got a solid foundation in the Evo SL — that nylon plate and aggressive rocker are built for the speed work you're already doing. For marathon build-up, a carbon-plated trainer will give you more cushion and energy return on the longer, marathon-paced efforts without burning through foam as fast as a race shoe would. From what I'm seeing in your retrieval, **Brooks Hyperion Max v3** is the strongest fit for marathon training. It's a proper long-run shoe (46/38mm stack, nylon SpeedVault plate for smooth roll-through) with DNA GOLD PEBA midsole that rewards the steady 7:30–8:30 pace work you'll be doing in build-up. The 8mm drop matches your Evo SL exactly, so no transition friction. Mixed expert reception is worth flagging — durability notes mention outsole wear earlier than expected — but the midsole is holding up well, and for a 16–20 week marathon block, that's the part that matters. **HOKA Mach X v3** is the alternative if you want something snappier and lighter (266g vs 289g). It's technically a speed-training shoe, but reviewers use it for long runs and marathon pace work. The trade-off: 5mm drop (2mm lower than your Evo SL) and a Pebax plate that's less forgiving on fatigue miles — better for uptempo long runs than true recovery-pace marathons. **Kiprun Kipstorm Tempo v1** is the value play. Sub-£100 pricing, maximal cushion (43/35mm), and The Run Testers rate it as a genuine Megablast rival for marathon-paced work. It runs long, so size down half a size. The firmer, rockered ride is closer to your Evo SL's character than the Brooks, which some runners prefer for tempo-to-marathon transitions. One clarifying question: are you targeting a specific marathon goal (time, BQ, just finish strong), and do you prefer a firmer, snappier ride or softer, more cushioned feel on the long stuff?

assistant: All three are solid steps up in cushion from the Evo SL while keeping the snappy character you're used to — but they're solving different problems. **Nike Zoom Fly v6** is the most versatile pick for your situation. It's a proper carbon-plated trainer (40/32mm stack, full-length Flyplate) that handles easy miles as well as tempos without the aggressive rocker fatigue of the Evo SL. Doctors of Running calls it "softer, stiffer and better at easy paces" than comparable shoes, and EDDBUD scored it 11.7/12 for marathon training — long runs, tempos, and intervals all in one shoe. The 8mm drop matches your Evo SL exactly, so zero transition friction. At $170, it's the value play too. **Saucony Endorphin Speed v5** is the nimbler alternative — lighter (238g vs 244g), snappier nylon plate, and it's what you're already familiar with biomechanically (same 8mm drop, same stack height as your Evo SL). EDDBUD rates it more agile than the Zoom Fly 6, but the trade-off is less cushion on fatigue miles and a narrower fit. If you want the Evo SL's turnover without adding bulk, this is it — but durability is ~100 miles, so it's more of a speed-work / marathon-pace shoe than a daily trainer. **HOKA Mach X v3** is the cushion-forward option. Maximal stack (46/41mm) with a Pebax plate that's softer than carbon, so it rewards the steady easy-run pacing you're doing 80% of the week. The 5mm drop is 2mm lower than your Evo SL — not a dealbreaker for a midfoot striker, but it'll feel slightly more forefoot-biased on the first few runs. Well-regarded reviews, true-to-size fit. Best if your legs are craving recovery cushion without sacrificing turnover. For 40 mpw with mostly easy miles, **Zoom Fly v6 edges ahead** — it's the most forgiving on fatigue while keeping the snappy feel you love, and it's durable enough to rotate with the Evo SL without wearing either out too fast. The Speed v5 is the play if you want to stay razor-sharp; the Mach X v3 if cushion is the priority. One follow-up: are you planning to keep the Evo SL in rotation for speed work, or retire it once you add the new shoe?

assistant: **Nike Zoom Fly v6** wins for your situation. It's the more durable, versatile pick at 40 mpw — the carbon plate handles easy miles as well as tempos without the aggressive rocker fatigue, and EDDBUD scored it 11.7/12 specifically for marathon training (long runs, tempos, intervals all in one shoe). The 8mm drop matches your Endorphin Speed v5 exactly, zero transition friction. At $170, it's also $30 cheaper. The **Brooks Hyperion Max v3** is the heavier, more specialized long-run tool. It's built for sustained marathon-paced efforts, but Doctors of Running flags a real instability issue — the medial midfoot cutout can feel wobbly when you're fatigued on miles 18+. That's a problem on your long runs. The mixed expert reception reflects that trade-off: great midsole durability (holding up well at 100 miles), but the ride is chunky and the upper is overdone. For 40 mpw rotation work, the Zoom Fly v6 is the safer, more forgiving choice. On the **Adidas Adizero Prime X 3 Strung** — not overkill, but not the move for you right now. It's a max-stack trainer (48/41mm) built for heavier runners or those who want a rigid, controlling ride. You're 155 lb and a midfoot striker who already loves the snappy, dynamic character of the Evo SL. BITR nailed it: the Prime X 3 feels clunky and bottom-heavy, doesn't deliver the bounce the 50mm stack suggests, and at $300 it's hard to justify when the Evo SL exists at half the cost. It also requires 40 miles of break-in before the foam softens — not ideal for marathon build-up when you want consistency week to week. Save the Prime X 3 for later if you ever shift to heavier mileage or want a dedicated recovery trainer; right now, the Zoom Fly v6 gives you more versatility and fun. **Zoom Fly v6 + Evo SL rotation** keeps you sharp and durable. The Zoom Fly handles the long stuff and tempos; the Evo SL stays your speed-work weapon.