Both cards will eventually receive price reductions because they are a lot cheaper to produce than the HD 6800 series. The HD 7750 even runs at 55W with a max TDP of 75W. That means it can run off the PCIe slot's power pins rather than needing a separate 6-pin connector. If this isn't important to you, and you need a video card now, do what Logan suggests and buy a HD 6870 (or even a 560 Ti if you don't mind Nvidia's min FPS issues.)
http://www.anandtech.com/show/5541/a...edition-review
The power savings are nice, but the price is not right. Not right at all.