Well this is the kind of machine you can put together for 2100 USD on your own.
Including the current fastest GPU, fastest CPU for that form factor, one of the fastest 256GB SSD's and a really high quality 80+ platinum PSU.
And obviously OS as well. Not sure what your stuff had for specs, but if you are not getting this much power you are really overpaying.
Obviously if you want to go larger with the Phenom-M it does allow some tweaking and would allow the use of SLI.
PCPartPicker part list:
http://pcpartpicker.com/p/2NTnA
Price breakdown by merchant:
http://pcpartpicker.com/p/2NTnA/by_merchant/
Benchmarks:
http://pcpartpicker.com/p/2NTnA/benchmarks/
CPU: Intel Core i7-4770K 3.5GHz Quad-Core Processor ($319.99 @ Amazon)
CPU Cooler: Corsair H80i 77.0 CFM Liquid CPU Cooler ($86.45 @ Amazon)
Motherboard: Asus MAXIMUS VI IMPACT Mini ITX LGA1150 Motherboard ($209.99 @ NCIX US)
Memory: Corsair Vengeance LP 16GB (2 x 8GB) DDR3-1866 Memory ($189.99 @ Newegg)
Storage: Samsung 840 Pro Series 256GB 2.5" Solid State Disk ($209.99 @ Amazon)
Storage: Western Digital Caviar Black 1TB 3.5" 7200RPM Internal Hard Drive ($87.97 @ OutletPC)
Video Card: MSI GeForce GTX 780 Ti 3GB Video Card ($699.99 @ Microcenter)
Case: BitFenix Phenom Midnight Black Mini ITX Tower Case ($69.99 @ NCIX US)
Power Supply: SeaSonic 660W 80+ Platinum Certified Fully-Modular ATX Power Supply ($146.97 @ OutletPC)
Operating System: Microsoft Windows 8.1 - OEM (64-bit) ($89.99 @ NCIX US)
Total: $2111.32
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-05 16:34 EST-0500)