So anyhow, I went with 2 of these GTX670s >
http://www.newegg.com/Product/Produc...82E16814125423
Reasons:
1)
http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-6.html
2)
http://www.tomshardware.com/reviews/geforce-gtx-670-test-review,3217-16.html
3) Price - I would get the Zotac AMP! but it is significantly more expensive where I am.
4)
http://www.xbitlabs.com/articles/graphics/display/gigabyte-palit-zotac-geforce-gtx-670_3.html
"Interestingly, our monitoring utilities both reported a peak GPU clock rate of 1189 MHz, although the specified boost frequency is 1058 MHz. Indeed, judging by the frame rate in Aliens vs. Predator (2010), the graphics card was somewhat faster than if it had been clocked at 1058 MHz. Moreover, we managed to overclock the GPU by 120 MHz to 1100 MHz without changing its voltage! Thats an excellent result, especially as the boost clock rate was as high as 1310 MHz at some point. The graphics memory was stable at 7568 MHz (+30%):"
5) After 3 years of AMD, I feel it would be good to jump over to the other side to have a personal comparison of quality of service, patching etc.
Thanks for all your help.