NIIIIICE!
The new Dura ace shifts wonderfully and the new crank set up resists the normal flex of the old stuff so you will have more efficient power transfer. The local Shimano factory rep let me ride his Giant OCR with the new stuff just last week.
I just got a new CAAD5 frame myself and installed all the old DA from my K2 MOD 5.0 onto it and after adding pedals and cages it came in at 17.6 pounds. I am running the 2001 Ksyrium SSC SL wheelset on it. The new Dura Ace wheelset is designed around their new 10 spd and is lighter than the new Ksyriums, which wheelset are you running?
I love this frame since it is the stars and stripes 9/11 comemorative model. It is real beauty of a bike. I hate sweating all over it but boy is it fast.
I've been down on Shimano lately due to the monopolizing practices but I have to admit the new road stuff is sweet. I hate the integrated mountain bike shifters however.