Its LGA2011-3 now.eg
http://www.tomshardware.com/reviews/intel-x99-haswell-e-overclocking,3934-17.html ASRock X99 Extreme 4
and
http://cpuboss.com/cpus/Intel-Xeon-E5645-vs-Intel-Core-i7-4930K even i7 4930k is stronger than the Xeon.
Its now i7 5820k or 5930k
PSU - get a good one from tiers 1, 2a or 2b of
http://www.tomshardware.com/answers/id-1804779/power-supply-unit-tier-list.html
For one GPU, it won't be $5000
Try -
CPU: Intel Core i7-5820K 3.3GHz 6-Core Processor ($384.99 @ NCIX US)
CPU Cooler: Noctua NH-D14 SE2011 CPU Cooler ($74.98 @ OutletPC)
Motherboard: ASRock X99 Extreme6 ATX LGA2011-3 Motherboard ($266.13 @ Newegg)
Memory: G.Skill Ripjaws Series 16GB (4 x 4GB) DDR4-2133 Memory ($249.99 @ Newegg)
Storage: Samsung 840 EVO 250GB 2.5" Solid State Drive ($159.99 @ B&H)
Storage: Seagate 4TB 3.5" 5900RPM Hybrid Internal Hard Drive ($169.99 @ Amazon)
Video Card: Asus GeForce GTX 980 4GB Video Card ($559.99 @ Amazon)
Case: Cooler Master HAF XM (Black) ATX Mid Tower Case ($89.99 @ Newegg)
Power Supply: EVGA SuperNOVA NEX 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($64.99 @ NCIX US)
Optical Drive: Asus BC-12B1ST/BLK/B/AS Blu-Ray Reader, DVD/CD Writer ($43.99 @ Newegg)
Operating System: Microsoft Windows 8.1 Pro (OEM) (64-bit) ($130.74 @ Amazon)
Wireless Network Adapter: Asus PCE-N53 802.11a/b/g/n PCI-Express x1 Wi-Fi Adapter ($28.99 @ Newegg)
Total: $2224.76