The only 6790 available locally here is a HIS for $154, the HIS 6850 is $168 but prefer the Gigabyte for $173, in the comparison test it is very close but I think the 6850 is a bit better:
http://www.hwcompare.com/9995/radeon...adeon-hd-6850/
What do you think Arclight?
The video card is Gigabyte the PSU is Vantec.