I like the Roubaix a lot and an S-works would be sweet if you can snatch one up in your budget range. Only thing I would look at personally would be a Synapse or a Hi-Mod, as the reply above suggests, an Evo would be really nice, too, but that is me, YMMV. I will look at the 2013 catalog I picked up and see which frames are sold bare when I get home from work.

Bill