Video Card Buying Help

Between Amazon, Newegg, Tom's Hardware, etc. I have come up w/ a list that I think is of good quality.

My build:

Asus M5A97
Phenom II 965
Crucial Ballistix 2x4GB
OCZ 700 W PSU
Monitor 1920x1080

The GPUs that I have come down to are (in this order):

5870
6870
560
6850
460
5830

Does anyone know of one that will perform equally or better than any of these, and which one is the best choice at $150 and under?