I have the '05 Comp. It's a decent bike, except I've found the Dura Ace components temperamental at times (end up trimming). I rode it daily through the last part of winter and it held up well. Surpringly enough, I didn't have to replace the chain or anything when she went in for her spring tune up about a month ago.
Have you checked out the Bianchi Eros Donna? It's a much nicer ride for a comparable price, and I love those campy components!