Check this out. Needs a GPU, but it's $744.96. I'm sure people will pick apart what you should or shouldn't get. This is all purchasable at microcenter. If you buy prebuilt, you're limited on upgrades sometimes because they'll use crappier motherboards and stuff. You want to go strong on the CPU/MOTHERBOARD and the GPU goes to your budget and need. I personally would not do anything too crazy if you just wanna play bf4. But you'll probably want more down the line. You build it yourself and most parts have 3 year+ warranties included.