Look at Felt and Cervelo. Felt's 2009 model the B16 is listed (for now) at $2300, but with the economy the way it is I bet you can get one cheaper even though it's a new model. You'd be on a 50 in the Felts. Stack=48.5, Reach=39.0, TT=50
http://www.feltracing.com/09-catalog...on/09-b16.aspx

2008 B12s are going to be just out of your price range. In another month or so, maybe in your price range.
http://www.nytro.com/ProductDetails....Show=TechSpecs

Cervelo's P2C would be another one that would probably work well, but a tad out of your price range. You'd probably ride the 48.
http://www.nytro.com/Cervelo_P2C_Tri...rv_p2c_ult.htm

At your size, you should be on a bike with 650 wheels, which rules out the Treks and Orbeas.