I picked up a nice used Lenovo Idea Center K330B 7747-2BU for $250. It has Intel HD 2000 Graphics, I5-2320 3Ghz, 8 gigs RAM, 300 watt power supply. I would like to put a nicer video card in it to do some gaming. I can't seem to find much motherboard info on it other than it does have a PCI Express x16 slot. I would of course like to pick the best card without overdoing it and paying for more card than I need for the system. Anyone have any suggestions on the best card for me? I'm considering the new 7790 about to come out, but I really have no idea what card would be best. I figure I may have to upgrade my power supply as well. Thanks for any help you can offer...