Originally Posted by Mr. Beanz
I'd get anything with 105 minimum. It works more than good enough. I have DAh finely tuned and I can't tell which one I'm on afer 3 minutes of riding.
If you want carbon, I'd go with that bike equipped with atlest 105. Upgrading is not very expensive if you do it yourself. Find a buddy to help you out. Plenty of partners in this place to help you out.
I've picked up a Dura Ace rear derailleur for as little as $64 with no tax at a sale. So I picked up 2!
If you can afford the top of the line, it's nice.
But don't listen to Drew, he's a rich kid!

I bopught my Cannondale Ultegra equipped. Uprgraded to Duar Ace for $320 with the needed tools included. Look for the supersales, pick up the parts even if you don't need them right away. Plan ahead.
But to be honest, I bet the 105 will never really need replacing unless you crash. Don't go to the bike shop for upgrading or it will cost an arm and a leg. Let's just say the shop wanted $15 for bar tape, and $15 to install it. I bought it myself for $12 and installed it for freeeeeeeeee! $12 is a big differ from $35!
Now beanz, thas not true....
I'm just going by my experience.... bought a Mtb bike just to spend the next couple
years upgrading....
But I'm sure its' just for the Bling factor and ego..