Can someone point me to an upgraded power supply for the HP Pavilion m8100y? I have one onorder which will get here next week, but it's a micro-atx setup (I believe) and comes with a stock 350w power supply. I "think" I can order another HP PS on their site which may fit which is 460W, but I wonder what other tried and true options there are. I'm hoping to install an 8800GTX and want a strong PS in it.