Last year I bought a Cannondale R600 and love it. I've done quite a few upgrades, wheels, seat, etc. I'm thinking about upgrading the 105/ultegra components to full ultegra 10sp group as I plan on doing some racing next year. My question is if you think it is stupid to keep adding more expensive compnenets to a relatively inexpensive bike? Should I forget the upgrades and just look at getting a nicer bike?