Up until now, my 450W PSU has served me well. However, it gives out when I try to connect another hard drive, so I know it won't be ready for Crossfire. So I have been shopping around with my limited knowledge of power supplies, basing most of my opinions off user reviews (dangerous, I know, but it's all I've got). I'd like at least 600W with plenty of SATA and peripheral connectors for under $100 (I can go over $100, but I would rather not atm). I have found two that I think will do the job, but I just want to make sure I don't end up buying a total piece of crap. Ultra X-finity #1 http://www.tigerdirect.com/applications/Se...&CatId=1483 Ultra X-finity #2 http://www.tigerdirect.com/applications/Se...&CatId=1483 Any advice (trusted brands, trusted shops, a specific PSU) is welcome. THIS is my case, btw.