I'd build my own of something similar to this:
Orientation: Standard
Standard Color: Red
Standard
Remote Controlled Multi-Colored LED
ORIGIN High-Performance Ultra Silent Fans- Black - Extreme Cooling Setup
ASUS Rampage IV Extreme
ORIGIN CRYOGENIC CPU & Motherboard Liquid Cooling
Blue
Koolance Performance Coolant - Red
Intel Extreme Core i7 4960X Hex-Core 3.6GHz (4.0GHz TurboBoost)
1.2 Kilowatt Corsair AX1200i
Dual 3GB NVIDIA GTX 780 Ti
32GB Corsair Vengeance 1866Mhz (4x8GB)
Genuine MS Windows 8.1 Professional 64-Bit Edition
LSI MegaRaid 9260-4i RAID Controller (Not compatible for boot drives over 2TB)
RAID 0: For better speed and performance (2 Identical OS Drives Required)
1TB Samsung 840 Evo Series
2TB SATA 3.0Gb/s, 7200RPM, 32MB Cache
RAID 1: For better data safety and security (2 or 4 identical drives needed)
4TB Western Digital Black SATA 6.0Gb/s, 7200RPM, 64MB Cache
4TB Western Digital Black SATA 6.0Gb/s, 7200RPM, 64MB Cache
5 Bay Hot-Swap Cage
16X Blu-ray Burner
Cryogenic Cooling Support
40-in-1 Media Card Reader
ASUS Xonar Essence STX
D-Link Wireless DWA-566 PCI Express Desktop Adapter
ORIGIN Wooden Crate Armor
1 Year Part Replacement and 45 Day Free Shipping Warranty with Lifetime Labor/24-7 Support
ORIGIN Recovery USB3.0 Flash Drive
No Part Upgrade Service
ORIGIN PC G8 T-Shirt XL
LG 29" 29EB73-P UltraWide 21:9 IPS Monitor
LG 29" 29EB73-P UltraWide 21:9 IPS Monitor
LG 29" 29EB73-P UltraWide 21:9 IPS Monitor
Microsoft Internet Explorer
I would build it, using this as a reference. It's pure power when it comes to gaming and it will render out most stuff in an instant. But I still would recommend just spending about $1,500 - $3,000 and save the rest on future upgrades, knowing how fast hardware evolves. With that much, you can still make a PC that will play high-end games with 60+ fps.