Looking for a good Gaming PC?

I'm looking for a good gaming PC that will run games such as Minecraft, Dayz, and TF2. (If I get DayZ I will wait for it to come out of Alpha so it doesn't lag as bad.) The price range I'm looking at is 400-600. No more than 600.

Well I recommend the CybertronPC GM2222D 5150 Escape Gaming PC

-Processor: AMD FX 4100 3.60GHz Quad-Core; Motherboard: AMD 760G Chipset; Memory: 8GB DDR3 SDRAM; Hard Drive: 500GB (7200 RPM); Genuine Windows 7 Home Premium 64-bit
-Graphics: AMD Radeon HD6670 1GB Video Card; Optical Drive: 22X Dual-Layer Super-Multi Drive; Audio: High Definition 2/4/5.1/7.1 Channel; Integrated 10/100/1000 Gigabit Ethernet LAN
-Expansions: Bays Total (Free) - 3 ( 1 ) External 5.25"; 6 ( 5 ) Internal 3.5"; 2 ( 2 ) Internal 2.5"; Slots Total (Free) - 1 ( 1 ) PCI; 1 ( 1 ) PCI Express x1; 1 ( 0 ) PCI Express x16; 2 ( 0 ) DIMM 240-Pin
-Connectivity: 2 x PS/2; 5 x Hi-Speed USB 2.0 [1 front, 4 rear]; 1 x RJ-45 Network Ethernet 10Base-T/100Base-TX/1000Base-T; Audio; 1 x DVI; 1 x HDMI; 1 x D-Sub VGA
-Chassis: In-Win MANA 134 Gaming Mid-Tower Case with 400 Watt Power Supply; Accessories: Keyboard and Optical Mouse with Scroll; Service & Support Details: 1 Year Parts & Labor Warranty; Free Lifetime Tech Support

The CybertronPC 5150 Escape is ready to help you escape from the straight jacket of slow gaming. It features a 3.60 GHz AMD FX-4100 quad-core processor that's been unlocked for easy over clocking, which is complemented by an AMD Radeon HD 6670 graphics card with 1 GB of video memory and 8 GB of installed RAM. The system stays quiet and cool thanks to the front LED fan control panel. It's backed by a 1-year limited warranty as well as free phone-based lifetime hardware technical support. It comes pre-installed with the 64-bit version of Microsoft Windows 7 Home Premium
http://www.amazon.com/...0080NQCWY/

I think anything with a good processor, graphics card and a decent amount of RAM would be good so alienware, hp phoenix or anything else which has good specs.

Gateway NV55S05u