I'm reentering the bicycling world after a long absence. Due to an old back injury, I don't run anymore. I'm looking to get a new road bike for training and riding to work. I want to also do group rides and charity events. I may also consider duathlon (swim/run) in the future. Bike doesn't have to be a race bike, but I want performance and at least 105 group. I have two options that I really like. 2008 Fuji Roubaix Pro (MSRP is $1470, my price $1199) or 2008 Fuji Team Carbon (MSRP $2100, my price $1599). My debate is I wanted to stay under $2k for everything (helmet, shoes, pedals, shorts, etc). Roubaix Pro has aluminum frame with Carbon fork and seatstays. However, I wonder if CF will be better for my back (lumar surgery) in the long run. Roads where I live are not the greatest and I'll definitely run a wider tire (maybe 28mm). Will I REALLY benefit from the extra $400 of the Team? The only other difference in the 2 bikes is that the Team comes with Shimano R-500 wheelset and the Roubaix an Alex wheelset. All knowledgeable advice is greatly appreciated.