Hi. I want to upgrade the PSU on my GATEWAY DX4200 to 650 or 750W. I've been looking at these two: http://www.newegg.com/Product/Product.aspx?Item=N82E16817703029 http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005 Anybody know if these are compatible with my DX4200? If not what is a good, compatible equivelent? Thanx, Ondre