The fork and seatpost aren't really carbon. The fork is a carbon composite (think carbon/plastic alloy) and the seatpost is wrapped in a film that looks like carbon. The frame's pretty flexy and doesn't handle amazingly well. You'll be a lot happier with a completely different bike. I had the same bike for almost a year (an older model, though, but I still bought it new back then), and I didn't realize how bad it was until I bought a decent road bike. I had crashed it a few times, and was actually kinda glad when on the last time the bike wasn't really fit for racing anymore, which gave me an excuse to buy a new one. I ended up going Ultegra/full carbon on the replacement bike and the difference was astonishing.

EDIT: I looked at the tech specs for the bike, and it looks like they changed the composite fork this year and made it carbon. It was composite when I had the bike, but whatever. It still has a Cro-moly steerer tube, though, which means you don't get much of the benefit of a nicer carbon fork that has a carbon steerer tube.

I agree with Triguy98...SORA components are Shimano's pedestrian road components and are just made to ge the job done. I think by upgrading to an entirely new bike, you will ultimately save yourself money as even by upgrading the group on you Allez, you will have to spend a fairly large sum of money for just the group, whereas if you buy a complete bike you will save money as you are buying the whole thing together. Even an Ultegra group can cost you $800 to $900 I believe. You can get the new Trek Madone 5.2 for $3,512 and that comes complete with Ultegra components, Bontranger X-Lite Wheels, OCLV Black Carbon, and other goodies! I mean, Disco rode the same model in the 2007 Tour de France...and it's not even the 6.9 model (which is insane). Yeah, I really like the new Madone.