The DRAM market is a pretty volatile so you might as get while the getting is good. Take for instance today's top deal for a kit of G.Skill Sniper Series 16GB (2x8GB) DDR3-1866 Desktop Memory for $149 with free shipping (normally $165 -- use coupon code: [ EMCPWWC46 ]). It's a fast frequency kit with tight timings (9-10-9-28) and plenty of capacity to handle a high-end system. If you're really heavy into content creation and/or other tasks that consume RAM like a pack of cats at a catnip buffet, pick up two kits for a total of 32GB!
Intel Core i5-4670 Haswell 3.4GHz LGA 1150 84W Quad-Core Desktop Processor
with free shipping (normally $220 - use coupon code: [
WD Black Series 1TB 7200 RPM 3.5-inch Internal Hard Drive for $79 with free shipping (normally $89 - use coupon code: [ EMCPWWC34 ])
Corsair HX Series HX750 750W Modular Power Supply for $110 with free shipping (normally $130 - use coupon code: [ EMCPWWC35 ]; adittional $20 Mail-in rebate)
PowerColor AX7870 Radeon HD 7870 GHz Edition 2GB Video Card for $180 with free shipping (normally $190 - use coupon code: [ EMCPWWC222 ]; adittional $30 Mail-in rebate)