I was thinking of getting a cyclocross bike- I live in NYC and want a bike that will go relatively fast and is relatively light but am worried about buying a road bike due to the vast amount of potholes and curbs. I currently have a mountain bike and have heard of hybrid bikes but they just look too damn wimpy for my tastes. I read in these very forums that high pressure tires would work best rather than knobby ones in terms of avoiding blowouts in pothole conditions- also that thicker tires would also help. SO, if I just got a regular road bike and had some thicker, higher-pressure tires put on, would I be able to ride that around and not have to worry about my tires popping every day due to landing in a pothole? Or should I get a cyclocross bike for ground clearance reasons and get thicker tires on that? I am thinking in the back of my mind that I may want to get into racing a year or two down the road. If I buy a cyclocross bike, will the frame put me at that big of a disadvantage vs. road bikes in a road race? I would appreciate anyone's thoughts as I am about to lay out a pretty decent chunk of money and don't want to do the wrong thing! Also, if anyone knows of any good used bike store in NYC/surrounding areas, let me know that as well. Thanks!