I think GLC is right, once you have a bike that component level is acceptable and is a good frame fit you stop really shopping. My Cannondale only has 105 but I like the 105, if I keep the front deraileaur trimmed in it shifts magically for me (triple crank). The carbon frame is light, rides nicely so I am content. Sure I would just love a custom steel or ti bike but those are not in the cards and nothing on the shelf is more than a drivetrain upgrade for me. The only thing I want, some better bars because the ones they use don't make me happy like my old Salsas.
Did buying the Cannondale improve my cycling? No. Because I don't train for anything, I just ride my bike. It made me happier and I like it more. But don't expect that a bike will magically make you a 10x better rider, you might see some improvement but hard works pays more.
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan