I will say this: For riding around town, commuting, or even certain tours -- I prefer my 1990 Novara XR that I built up for less than $300 over my $4k+ carbon BH RX1. Yes, there is a top speed difference but frankly I'm not riding at full tilt around town. Plus, the speed difference once you get going isn't that substantial. I'd way rather take the comfort of the Novara over the speed of the BH. Hell, I'd rather be riding my bike for longer than arriving to wherever it is I'm going a few minutes sooner. Get a mountain bike, put 1.5-2.0 slick tires on it and enjoy.

Much prefer this:

Over this: