Thanks for the update Archer - especially for putting in the prices on the chart too!
Sorry that I'm only now giving you some updates
You could've actually decreased quite a few HD 68xx & 69xx prices, by using the VTX3D prices of WootWare:
http://www.wootware.co.za/catalogsearch/result/?q=vtx3d&x=0&y=0
HD 6850 @ R1,599
HD 6870 @ R1,999
HD 6950 @ R2,499
HD 6970 @ R3,338
Rampage Gaming is selling the:
Inno3D GTX 570 1280MB @ R3,330
Inno3D GTX 460 1GB @ R1,675
Inno3D GTX 550 Ti 1GB @ R1,445 - but this card is so not worth it for this price
Take2 is still selling the
Gigabyte GTX 560 Ti 1GB OC for R2,532 and they actually have it in stock!
This would place the card on par with the HD 6950 that isn't modified to 6970. My guess is that you should be able to OC it to like 950MHz, which would be pretty much on par with the MSI GTX 560 Ti Twin Frozr II - like shown
here - in which case it'll outperform the HD 6970 !