Any thoughts on trying out a Giant Defy? You can get a Defy Advanced 4 for around $1500, albeit with Tiagra parts. I believe the frame however, is exactly the same as the higher model bikes.
Or Felt Z series? Z6, MRSP $1599, gets you into carbon with 105. I know there are a zillion CAAD fans on this forum, but I seriously don't think you should limit yourself if you haven't tried the other bikes.
Based on your description of where you want to ride - I'm assuming you live in CO, and there are a million bike shops.