What Videocard?

What does the rest of your setup look like? What parts do you already have.

yes it can be a little pointless if you have a celeron 1ghz and put a $700 gpu with it.

can you post the specs of the rest of your system. This will also determine if a Single Card or Dual card setup is going to be the best.

If you have that much to spend, you'll get the most power out of a dual card system, such as 2 x Radeon 7870's. But one card is always preferable to two. If it's possible to spend up a little, then dual GTX 670's will be able to handle anything for a couple of years. Those will be $800 though.