if you go to your LBS, you can order a kit through QBP---specifically you can choose what items you want in your kit---you dont have to choose the STI's. I think its way cheaper to go through ebay or a newsgroup though. I've built my bike up part by part and continue to do so. When i got all of the nicest items on my current frame, I can buy a P2k or something, frame only, switch over the components, sell my old frame which will help offset the cost of the newer one.
Another thought, work 4 hrs a week at your LBS, REI or other shop and you'll never want to pay retail again, cause the prodeals are that good. Shimano's prodeals are over 50% off. The latest Giro helmet for $50. Profile has got a great discount program as well.
Have fun!
Want: 58cm Cervelo Soloist. PM me if you have one to sell
Vintage Cervelo: A Resource