Oblivion Video Cards

Hey guys, I am in the market for a new video card to be able to play TES:OBLIVION, I was curious. Those who play it on their PC's, would you care to tell me what video card you use. I am on a budget so I need a card that can play it fairly well but is not outrageously overpriced.

Radeon X1800XT 512MB
GeForce 7900GT 256MB

Both around ~$300 US, both perform more or less the same.  300 is right around the price/performance sweet spot, from what I've seen.