i have following config. c2d e4600 2.4 ghz kingston 2+1 gb ddr2 ram 800 mhz seagate 1tb 7200.12 hdd + wd 160gb hdd ati hd4850 512mb gpu hp dvd-rw drive i need a good psu... pleasen suggest some good psu's.. my range is 2-3k