assistant: I'm reading your mention of "Endorphin Pro 4" as the **ASICS Metaspeed Sky Tokyo**, which is the current ASICS flagship marathon racer — let me know if you meant a different model. For a sub-3 marathon attempt at your weight and fitness level (6:00/mi tempo = ~2:38 marathon fitness), you want a shoe that rewards your stride efficiency and holds up through 26.2 miles without sacrificing responsiveness. Your neutral gait and proven comfort in the Sky Tokyo give us a clear anchor. The **Adidas Adizero Adios Pro 4** is my top pick for you. It's lighter (201g vs. the Sky's 159g, but the Sky's ultra-light build comes with a trampoline-like bounce that EDDBUD notes "lacks snap" compared to prior versions), more responsive, and built for confident fast runners chasing marathon times. Kofuzi calls it a "lighter and faster shoe" that allows for "quicker turnover," and Doctors of Running notes it "comes alive at faster paces" — exactly your profile. The 6.0mm drop matches your current shoe's geometry closely, and the rocker engages early (60–65% mark) to propel you through the late miles. **Caveat:** the toe box runs narrow and about a quarter-size short — The Run Testers strongly recommend going half size up, especially for marathon distance where toe-box pressure compounds over 26 miles. The **Mizuno Hyperwarp Elite** is a close alternative if you want a more stable, versatile platform. It's equally light (170g), has a snappier ride than the Sky, and EDDBUD praises its "excellent grip, durability, and stability" — valuable insurance on race day. The 3.5mm drop is lower than your current shoe, which is a small shift but worth noting if you're sensitive to calf loading. The **Puma Deviate Nitro Elite v4** rounds out the trio if you prefer a firmer, more traditional carbon-plate feel. EDDBUD calls it "one of the lightest Puma racers ever" and notes it "wants you to pick up the cadence" — a fit for your 6:00/mi tempo work. Doctors of Running found it "firm but very snappy" and "responded really well to faster paces." It's the most aggressive of the three and rewards hard foot-strikes, which suits a sub-3 chaser. **My verdict:** **Adios Pro 4** for outright speed and turnover at your fitness level, but size up half a size and test the toe box in training first if possible. If you want a safer, more stable platform, **Hyperwarp Elite** is the play. Which matters more to you — maximum speed/responsiveness, or a more forgiving, durable platform for the back half?