He is going with an i7 so 8 gigs won't really be a viable option. Either 6 or 12 since he will most likely be Tri-channeling his ram and using 3 sticks, or 6 sticks of 2gig RAM.
I just got Kingston HyperX T1 and I'm loving them. Price was great @ about 220$ for 6 gigs @ 2000mhz. The cooling fans that come with the ram looks awesome if you have a case that allows you to see inside.. prettty blue lights
as for 6 or 12, I would do some research into the programs you are using and how much RAM each of them eats up. I run Skype, Ventrillo, 2 instances of World of warcraft and FRAPS and don't use up all 6 gigs of my ram, so 12 might be slightly overkill right now /shrug