I'm looking to build a new system based on an e6600. I was planning on getting the x1900xt 256mb but suddenly everyone ran out of stock at the same time. Now I'm planning on getting a x1950 pro since it seems to be a fairly decent card for a good price. The reason I'm getting such an inexpensive graphics card is that I'm planning on upgrading to a dx10 capable one some time next year. As far as I've heard, 430 watts is plenty for a single card solution right now. My question is, will a 500 watt card be enough for a high end single card, say, 9 months from now?