Hello Jon,
sorry for reading your post a little late

Nevertheless, I think you made a good decision. I'm looking for a new video card myself at the moment, and I'd like to recommend a site I often check out before hardware purchases:
http://www.tomshardware.com/. There also is a .co.uk version, but to quote a reader, "the US site gets the news up first and isn't broken all the time." In your situation, this article would be helpful:
Best Graphics Cards for the Money: June 08
http://www.tomshardware.com/reviews/graphics-cards,1942.htmlThey also tested the 9600 GT (
review here). Other reviews I read feature the same results and conclusions, and for your budget, I'd also recommend the GeForce 9600 GT (better than the Radeon HD 3850).
I'm not sure if the new 430W PSU was really necessary, but I suppose it's of higher value than the standard PSUs Dell uses. If it has PFC (
power factor correction, protects the PC from voltage peaks) and a high efficiency (~80%,
explained here), it is probably a valuable addition to your system.
Hope this helps. Enjoy your new hardware
