Originally Posted by PhotoJoe

I think everyone has shown here that both are a great option. Force is lighter. 105 is cheaper. They definitely work differently and have different ergonomics. You really should ride one of each before you decide. Also, I think you are selling yourself short in picking the bike you are going to buy based on friends having CAAD's. Just like the groups, you should go ride on in your size. But, keep an open mind and ride others, too. Ride a Specialized Allez, Giant TCR, Felt F, etc. etc. It is amazing how, when ridden back to back, one bike may just "speak" to you. It may be more responsive, more comfortable, more fun. If you're going to spend the money, at least make sure it's the best bike FOR YOU, with group you like best. If it turns out to be a CAAD 10, GREAT! It's an awesome bike. So are the others, though. And the bike you like best is the bike you'll ride most! Have fun!