I've been looking for a good multi-purpose bike. I plan on toting my 2 year old around and commuting to work every once in awhile. The bike might see dirt roads, some grass but nothing extreme...no jumps, no cliff falls, just some cut trails. Does anyone know anything about the Felt X-city? I found one on Craigslist for $300 and am wondering if it's a good buy. I googled it and everyone raves about how great of a commuter and "urban assault" bike it is. What the heck is an urban assault bike? It has 700x38 tires and looks like a mountain bike...please help?!??!?!?