Originally Posted by DarkNWorn
+1. If you ride long distances out in the open, then a road bike. If you like to bike in the woods, then a mountain bike. But a cyclocross is good all around bike. It's almost as fast as a pure road bike, and almost as versatile as a mountain bike. If you're an urban rider (especially in NYC), it gives you the best of both worlds.
I think my next urban all-around bike will be a cross singlespeed.
I am contemplating a cross as well - I haven't taken my mountain bike on anything more than the occasional dirt road in quite awhile.
Other than simplicity (aka reliability) is there any reason you are leaning towards a single-speed?