I'm transitioning from riding fixed gear and single speed for 6 years and looking into my first road bike. I set my budget around $1,500ish.
I've test rode some Cannondales (CAAD10, CAAD12) and Trek so far and like Cannondale's more. I have yet to try Specialized, Fuji, Felt, etc.
My local shops have 2015 CAAD10 105 for closeout around $1,200 and I'm also considering the CAAD12 105 or Ultegra groups.
Is there a huge difference in 105 and Ultegra?