I am looking at buying this card
Newegg.ca - HIS H695F2G2M Radeon HD 6950 2GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity
And unlocking it to 6970 shaders. (Keeping the BIOS at 6950)
Has there been any luck with the 6950/6970 cards in Snow Leopard 10.6.7 as of yet?