I just use two systems on all my bikes, either Look road or SPD. All my shoes for road and track are Shimano. I race track and ride geared on road in Shimano SPD SL shoes with Look Delta cleats. My SPD shoe is a Shimano SH-MT51, which is a very walkable shoe. I use the SPD system on my commute geared bike and one of my street FG bikes (Kilo WT), and also my Cross bike and full suspension MTB. As far as NYC being stop and go, I'd say clipless is a lot more convenient than clips/straps in terms of getting in and out.