Preparing to assemble my first PC. It's primarily for gaming/normal use and I'm working with a pretty strict $650 budget. Just hoping some experienced builders out there could help me shape up the best rig my money can buy in Feburary. Don't have many particulars in terms of brands, other than I'd like a viable version of Windows (7 or 8.1, whichever you think is best going into 2014).Thanks in advance!