Even though groupos have gotten much better, I think you'll still be looking a bike with a mix of lx/xt parts and most likely a lower level front fork.
Just a thought, but you might look w/ a purpose to get the best frame you can get for the price w/ the intention of upgrading your parts as you go along.
Trek should have bikes in your $ range. Or maybe one of their other brands like Gary Fisher, etc.
Specialized has always impressed me w/ their value, but I'm kinda wary of Cannondale even though I have nothing concrete to back up my apprehensions. (Other then not being a twist shift fan.

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