I guess if we are just saying our dream bikes.....
Colab with Spicer, Icarus, or Yamaguchi and get something crazy awesome for the frame and fork. Lace 808's to Dura-ace, pretty much durace all around, 7000 series chainring, and a Selle Italia SLR. Time ULTeam Tri Carbon shoes and I-Click TI Carbon's.
OR
http://www.cannondale.com/usa/usaeng...S2C-SuperSix-2
OR
http://www.feltbicycles.com/USA/2010...ries/B2-R.aspx
Depends on my mood at the time I win this hypothetical $5k.