Since you're already used to zero-drop, I recommend Altra. They make zero drop shoes with lots of cushion. Their trail running shoe is the most comfortable shoe I've ever worn, so I'm considering buying a second pair to wear in the city (so I don't wear down the tread on my actual trail shoes). I don't know if you're the same way, but I've found that now that I'm used to zero/low drop, the heels on standard running/walking shoes seem clunky and it's hard for me to coordinate my steps comfortably (specifically I tried a pair of Asics recently and I couldn't walk in a way that felt natural in them). But if you only wear zero drop for running, and wear standard shoes the rest of the time, you probably won't have that problem.