Squadra is nice, but I think you end up compromising somewhere with an off-the-peg, unless you can haggle swaps in the price (I've only ever seen Specialized sold with Shimano).
Biased opinion:
I got a GB Carbon 7 frame, got a bit carried away building it up with Chorus etc but Phil N has a v. nice bike from the same frame with Veloce which would bring the price down if you couldn't afford to go the whole hog. If you want full Carbon you could build up around the Pearson Carbon Pro.
Honest opinion:
Agree with Grahame though, make sure you get what you want, it's a lot of money if you get it wrong. It's still a lot if you get it right, just easier to justify the expense.