I would get the newer bike myself. Having just built up a beautiful C'dale Super 6 Evo with the old school rim brakes, and did it cheap (under $1k using parts from another bike) I wished it didn't cost so much more to go with the current stuff. My own bike is now 18 years old and I was out on it yesterday going over the George Washington Bridge and I felt really old school. When I built it new it was the hottest bike around. You'll regret not getting the latest, even if 105 is a few steps down. I should add that the C'dale I built used 105 10sp and it shifts absolutely fine. And it rides much better than my own, but I built it for my daughter even though she hasn't been on it more than two or three times.