General rule of thumb is always get the best single card you can get for your money. I would def say the 580.
should I go ahead with the 6950 2gb crossfire or should i go with the single 580? the 580 is also cheaper. tempertures arent a problem as ill be doing watercooling
If I was to get the 6950's i could easily run games on full settings and still sit at a nice 90fps+ and 180 fps + on black ops, and i would not need to upgrade for atleast 1 year... If i would get the gtx 580 then that would still allow me to play games on top settings without problems but i would most likely end up upgrading to sli in the next 5 months... Looks like ill go with the gtx 580 which means when i do go sli the performance will be unbalievable.
i want a crossfire setup for one reason, GPU death least with xfire or sli if one goes you got a backup untill you can replace the broken one or replace both if they are not made anymore.
plus bragging rights....
im looking in to gtx 470 sli