I've made a build which I'll be building for summer 2014, it has drastically changed from my last build in February because I've decided to use Unreal Engine 4 now. My budget is USD$2500, with a bit of leeway. I'll be building either in late May or early August. I'll be using Visual Studio 2013, Unreal Engine 4, Hitfilm 2 Ultimate, Paint.NET, and will be playing Watch_Dogs, Titanfall, and other next-generation titles, as they come out, along with Humble Bundle games, and maybe a bit of CAD using Autodesk Inventor.
I will be overclocking.
PCPartPicker part list: http://pcpartpicker.com/p/3ABLD
CPU: Intel Core i7-4930K 3.4GHz 6-Core Processor ($529.99 @ Micro Center)
CPU Cooler: Corsair H100i 77.0 CFM Liquid CPU Cooler ($92.99 @ NCIX US)
Motherboard: Asus P9X79 LE ATX LGA2011 Motherboard ($229.98 @ SuperBiiz)
Memory: G.Skill Ripjaws X Series 32GB (4 x 8GB) DDR3-1600 Memory ($269.99 @ Newegg)
Storage: Samsung 840 EVO 1TB 2.5" Solid State Disk ($459.00 @ Amazon)
Video Card: EVGA GeForce GTX 780 3GB Superclocked ACX Video Card ($499.99 @ NCIX US)
Case: NZXT H440 (White/Black) ATX Mid Tower Case ($119.99 @ NCIX US)
Power Supply: Corsair Professional 750W 80+ Gold Certified Semi-Modular ATX Power Supply ($149.98 @ OutletPC)
Monitor: Asus VS238H-P 23.0" Monitor ($134.99 @ NCIX US)
Keyboard: Logitech G105 Wired Gaming Keyboard ($47.39 @ Amazon)
Mouse: Razer DeathAdder Wired Laser Mouse ($59.99 @ Amazon)