I know you've already pulled the trigger, so what I'm saying here probably isn't really targeted at you, per se, as much as just thrown out there for any one else looking to do the same thing -- buy a bike for road racing.
Get a cheap aluminum frame, hang Shimano 105 (or Ultegra if want a little lighter weight) on it, ride the HELL out of it, then throw it away.
You want something out there that you don't have to think about, something that you won't be tentative about throwing into a corner or diving through a gap, for fear of losing your "life savings" investment. I know there are people who will chime in and say "I've never thought about my bike when I've been racing", but I will also tell you I've seen people hesitate, and when talking to them later, they said "I was afraid I'd hurt the bike." Seriously. So don't get in that area at all.
Cheap bike, reliable equipment. Ride it like you stole it.
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Some are born to move the world to live their fantasies...
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