Dell Home & Office has the Alienware Alpha Compact Desktop on sale for $549.99 - $200 w/ coupon code AWSLICKDEALS - $45 Slickdeals Rebate = $304.99.
Specs
Intel Core i3-4130T Dual-Core CPU
4GB DDR3L
500GB HDD
Alpha chassis with NVIDIA GeForce GTX GPU 2GB GDDR5
Intel Dual Band Wireless-AC 3160 1x1
Windows 10