I am currently upgrading an HP PSU 300 watt to something better since I added a 6600GT and the PSU can no longer handle it. So I'm wondering, should I get a 40$ canadian thermaltake psu at 430w to handle my system for a year or 2 or should I get a really high end one like a raidmax 580w for 80$ candian and make it last to my next computer ?