Harlot. I don't know if you're looking at new frames exclusively, but I would say you could probably get a great deal by looking into an older steel frame. I recently picked up a gorgeous Razesa frame with a Chris King headset and a dura-ace bottom bracket for $500. Its certainly not top of the line, but for the money it was a great find.

Lots of older frames are out there and can be had for similar prices. Razesa's seem a little rare so you may not be able to find one of those (One sold on e-bay for $785ish a couple weeks ago.)

Just a thought.