Well, mine is certainly not brag worthy, hell it doesn't even have a discrete GPU as yet, but when I find myself some new employment I will be getting a HD 7850 or 7870 to go along with my current specs:
OS: Windows 7 64bit
GPU: Intel HD 4000
CPU: i5-3570k @ 3.5Ghz
RAM: Corsair Vengeance 8GB (2x4GB) 1600Mhz
Mobo: Gigabyte Z77P-D3
Storage 1: Seagate Momentus XT Hybrid 500GB
Storage 2: Fujitsu 250GB HDD
Case: Budget CIC gaming case. Stupid blue L.E.D fans, very thin metal construction, loud as hell, will be replaced ASAP.
Mouse: Gigabyte something or other, basic gaming mous but it does the job.
Keyboard: Generic Logitech keyboard that's like ten years old.
Headset: Turtle Beach X12
Speakers: Creative 2.1 surround speakers. Adequate, decent bass but the 2 speakers aren't great.
It's a surpringly decent rig considering there is no graphics card in it. I can play Battlefield 3 multiplayer, and I've yet to experience any real frame drops. I know that some PC gamers would scoff at my measly 30-40 consistant FPS, but it does it's job. Other potentially strenuous games I run on it regularly are Guild Wars 2, DiRT 3, Skyrim. Only game that I've ever noticed noticeable frame drops on was Formula1 2012, and that was rare. Admittedly most new games are on low settings, but that reall doesn't bother me, as long as it's playable till I get my proper graphics card.