I've got a 2008 Kona Jake with a mixed Gossamer/105/Ultegra drivetrain. I'm wondering how much I would benefit (racing) by upgrading to a better bike and how much better I'd have to go to make a significant difference. I realize that my fitness and handling skills are the ultimate determinant, and based on that I've been thinking I'd never outgrow this bike (I suck). On the other hand, I can use all the advantage I can get.
I was looking at the Specialized Crux and the Giant TCX, but other than having carbon forks and low-spoke count wheels, I'm not sure they're much different from the Jake. I don't think I have the budget for one of the nice Ridleys, but I could probably swing a frameset and move my current components over to it. I think I'm still crashing too often to go with a full carbon frame. I was thinking about getting a Winwood Dusty (carbon disc) fork and some Roval Pave wheels to upgrade the Jake.