How's this for unexpected: you can now pop over to Walmart.com and build yourself a custom gaming rig from iBuyPower. Systems start at $599 (though they're currently on sale for $578), come in a choice of five different cases and can be equipped with up to 8GB of RAM and a 2TB hard drive. Both Intel and AMD fans will find CPUs to make them happy, including Core i5 and i7 K-series chips, which have unlocked multipliers for all you thrift-happy overclockers out there. You can also choose from nine different AMD and NVIDIA graphics cards, all the way up to a 1.5GB GeForce GTX480. You wo
