There is no "best" commuter tire. It depends on the bike your are riding, the condition of your roads, the hilliness of your route and other factors. What is best for me might be terrible for you. That said, I have had excellent performance and wear with 700 x 25 Conti GP 4000s and recently installed some Conti GP 4 Season 28s that seem equally nice so far. My route is very hilly, so I value light weight as much as durability.