I ended up building my own last April which was about $700 total:
Processor: AMD FX-8350 8 core 4.0Ghz
Mobo: ASUS M5A99FX PRO R2.0 AM3+ AMD 990FX + SB950 SATA 6Gb/s USB 3.0 ATX
RAM: G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600
(PC3 12800)
Video: GeForce GT 430 (Fermi) 1GB 64-Bit DDR3 PCI Express 2.0 x16 HDCP
Hard Drive: Mushkin Enhanced Chronos MKNSSDCR120GB 2.5" 120GB SATA III SSD
Case: Rosewill CHALLENGER Black Gaming ATX Mid Tower Computer Case
Power Supply: Rosewill HIVE Series HIVE-750 750W Continuous @40°C,80 PLUS
BRONZE
Of course since then I added an MSI GTX 970 video card, a 3TB Seagate SATA
III hard drive, and a Steel Series Sensei RAW mouse, but the initial
investment I kept at a decent price since I had a monitor, keyboard, and
mouse from before.