New RAM is a good thing too. MAKE SURE YOUR PSU support Haswell, if you give us the exact model we can check.
PCPartPicker part list: http://pcpartpicker.com/p/14CfB
Price breakdown by merchant: http://pcpartpicker.com/p/14CfB/by_merchant/
CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($199.99 @ Microcenter)
Motherboard: ASRock Z87 Pro3 ATX LGA1150 Motherboard ($114.99 @ Newegg)
Memory: G.Skill Sniper Series 8GB (2 x 4GB) DDR3-1866 Memory ($69.30 @ Newegg)
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-07-26 23:45 EDT-0400)