That's the card I have... It works great so far, and to address the additional question, I can say that this specific card has given me absolutely zero problems with tf2.
I have it running with a 2.66 core duo Wolfdale, 4 gigs of RAM on an EVGA 780i mobo. The case is the monstrous Armor Case that MrBlah recommends. I really like it, frankly. Anyway, I am using two in an SLI configuration, but I never dip below 80 and run sometimes in the high hundreds for fps.
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Do you have all the eye candy on
like 16x(or higher) Anisotropic 
