Best video card on the market?

I was wondering if someone could tell me what video card is the absolute best for gaming? I have seen the cards that reach upwards of 2 - 4 thousand dollars, but it seems these are for high end business applications. just the best for gaming?|||The ones you saw are probably the Quadros, Teslas, and the FirePros. Those are enterprise GPUs and won't perform very well in games compared with their Radeon and GeForce counterparts. The current fastest GPU is the Asus Mars II which is a redesigned GTX 590 but the price is ridiculously unjustified @ $1500. The GTX 590 and the HD 6990 are the current fastest reference GPUs and they sell for around $700-$800.|||The two high end video cards are Nvidia's GTX 590 and AMD's Radeon 6990. Both of these cards have two GPUs on the card. Each of these will run you around $800. Their single-GPU counterparts, the the GTX 580 and Radeon 6970, are the second best, and these will cost you around $400. There have been many comparisons between them, and the general consensus is that the Nvidia card wins this round.