You didn't ask me, but I could do it too (got 8GB)
Or if you'd like I would love to fetch you some RAM; You can get 2x8 GB of some very fast stuff for only $100. or my set is only like $45 now, and I can help you seat the stuff. You'll hafta tell me your motherboard though... some can only hold 2x4GB, mine can go to 4x8GB, and server boards can go to 16x16GB.