Hi,
there are a bunch of nice frames around a grand. Btw, what do you mean by aggressive? At our age, I'd go with the sporty models rather than the race models. I ride a Gunnar Sport. I really liked the Habanero Road frame. A bike you might want to try is the carbon Trek Pilot. All these will come out to about $2K, give or take a couple hundred...
Is that a reasonable ballpark?