No need to choose between cross or SS. I commute on a single-speed Cross-Check and can't imagine going back to a geared bike for city riding. Light, easy, just grab it and go. Lets you totally focus on and enjoy the ride. That Fantom Cross Uno linked above is similar to what I have and a pretty phenomenal deal for $400. I paid $650 for the X-Check, slightly used off Craigs.