So I couldn't get him to budge on building the entire system himself. Today I ran across another Dell XPS 8700 and pulled the trigger. It's a bit cheaper than the Costco deal I posted earlier with 4 GB less ram. The total was about $621 after taxes. Someone posted a 25% off Dell coupon today and I jumped on it quickly.
Next up, we'll either purchase a GTX 760 and use the stock PSU or purchase a GTX 770 and buy a new PSU as well. The 280x you mentioned went OOS. What do you think about this EVGA card? Is there a better one? I noticed some higher clocked cards for $50+ more but they seem pricey for the small gain. Thanks again for the help.
EDIT: I mentioned two different PSU and GPU's below. They're cheaper. Thanks.
Newegg.com - EVGA GeForce GTX 770 DUAL SuperClocked 2GB 256-bit GDDR5 PCI Express 3.0 SLI Support w/ EVGA ACX Cooler Video Card 02G-P4-2776-KR
PSU: (Same you picked out)
SeaSonic M12II 620 Bronze 620W ATX12V V2.3 / EPS 12V V2.91 SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply - Newegg.com
-- Dell Outlet XPS 8700 Windows 8 64 Bit
-- NVIDIA GeForce GTX 645 1.0GB GDDR5
-- 12 GB Dual Channel DDR3 SDRAM at 1600MHz
-- Certified Refurbished
-- Processor: Intel Core 4th Generation i7-4770 Processor (8M Cache, up to 3.9 GHz)
-- 460 Watt Power supply Black
-- Dell Wireless 1703 802.11a/b/g/n, Bluetooth v4.0
-- 16X DVD +/- RW Drive
-- 1TB 7200 rpm SATA 6Gb/s Hard Drive
-- Dell USB 6-Button Laser Mouse
-- English Keyboard
-- Save 25% on any Dell Outlet XPS 8700 Desktop with this coupon!
-- XPS 8700 : *1 Year Enhanced Support (Premium Phone Support + In-Home Service after Remote Diagnosis)(included in Price)
Sales Tax: $29.59
Total Amount: $621.34