Any of those cards will serve you just fine. I usually hit Anandtech or Tomshardware for initial looks and check out what requirements are for power and what noise/heat levels are. A good quick check on http://www.anandtech.com/bench/GPU12/372 also is helpful. All 3 cards are spendy, and after looking at reviews you may end up choosing something a bit less top of the line to save a few bucks. I 5 box with a 5770 (lolol) and with settings low on slaves everything seems okay for the most part.