What type of computer for under 1000.00 is good enough to run World of Warcraft smoothly

just about all the Dell XPS studios can be built under 1k (including mine, but without a monitor cause i kept my one from my other computer) and it runs WoW in dal at peak times at 40-60 fps. in heriocs, 150+. yet anything over 60 is overkill anyways considering your eye cant even tell the difference past 60. anything over dual core processor is good. Radeon Hd 5770 graphics cards are only 120 right now. that's what i run with 8gb of ram