I'll be using it for 3d-moddeling (using blender), and a little bit of gaming (.
PCPartPicker part list: http://pcpartpicker.com/p/yQDk8d
Price breakdown by merchant: http://pcpartpicker.com/p/yQDk8d/by_merchant/
CPU: Intel Core i5-4430 3.0GHz Quad-Core Processor ($173.94 @ SuperBiiz)
Motherboard: Gigabyte GA-B85M-DS3H Micro ATX LGA1150 Motherboard ($55.98 @ OutletPC)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($55.98 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($49.99 @ Amazon)
Video Card: MSI GeForce GTX 760 2GB Video Card ($169.99 @ Newegg)
Case: BitFenix Ghost (Black) ATX Mid Tower Case ($79.99 @ NCIX US)
Power Supply: EVGA 500W 80+ Certified ATX Power Supply ($34.98 @ NCIX US)
Total: $620.85