Old thread but I'll add my rig in because I can.
Intel Core i5 2500K overclocked at 4.6GHz cooled by a Corsair H80.
ASRock Z68 Extreme4 Gen3 mother board.
16GB of Corsair Vengeance DDR3 1600MHz RAM
1x Samsung 840EVO 250GB SSD for OS and programs, 1x Samsung 840EVO 500GB SSD for games, 1x Seagate 2TB 7200rpm HDD for storage.
Asus ROG GTX580 Matrix Platinum graphics card
Asus Xonar Essence STX sound card
Cosair AX1200 power supply
Samsung BluRay drive
All of this is neatly placed into a Cosair Obsidian 600D case with a 200mm front intake fan, 200mm top exhaust fan plus the H80 is mounted with 2 120mm fans exhausting in a push pull fashion out the back.
Connected to this is a Max Nighthawk X7 mechanical keyboard with Cherry MX Blue switches and O-ring mod, Steel Series Sensei mouse, Razer Nostromo pad (have used one for gaming since the Belkin N52), Audio Technica ATH-AD900 headphones, Audio Technica AT202USB microphone and two Asus VS24H monitors.
I built this thing to play BF3 and it has served its purpose well into BF4. I play on a 24" 1080p monitor so i get between 50 and 70FPS in BF4 with everything on high. It started out with a single Crucial M4 128GB SSD, then I switched to two Samsung 840EVO 250GB SSDs before recently throwing one of those into my notebook and buying the 500GB SSD for this. The keyboard is recent also as now that I'm studying software development I do a whole lot more typing and the small Logitech keyboard I had wasn't up to the task. For games I use the Nostromo and never needed a decent keyboard before. Aside from that it's all as I originally built it, aside from a few cable management sessions and adding the sound card in their at some point when I got the AD900 headphones.
I want to upgrade the graphics card soon as I think that's the weakest link and if I replaced the CPU I'd be up for a new motherboard also. I've done some testing with the CPU running stock and running overclocked and it didn't make a massive improvement to FPS so I think it can last until we see what X99 and Broadwell are all about. I think two 770's in SLI would be sweet but I'll wait for GTX800 cards to show up to see what they're like. I'm also toying with the idea of a Mini-ITX build in a Corsair 250D or Micro-ATX build in a Fractal ARC Mini R2 case if I go the new CPU and MoBo route.