looking into a new purchase and trying to figure out if I want a used 2009 Trek 2.1 (asking $900 - hoping to get him down to $800) or a 2010 New Trek 2.1 ($1250). Why did Trek go away from the carbon stays on the 2010 2.1? Where can I find the best deal on a Cannondale CAAD9 5? If I can find a good deal on a CAAD9 5 (under $1300), I would jump on it. Thanks in advance.