http://www.newegg.com/Product/Product.a ... 6820231527
I'd recommend those. It's higher speed (1866) which is the fastest the board supports without overclocking. It's cheaper (by a lot) and you can buy as many as you want. Getting 32GB of that (which would only fill half that board, since it supports 8 slots!) would be about $160.
Never say never. Eventually the kernel will properly manage memory in Windows and you'll get a noticeable advantage in applications with 64GB. The advantage won't be whether or not it plays games x, y, or z better ... because it won't. Most games are currently capped at 4GB addressable space (they're 32-bit executable, after all) and the ones that aren't, likely get maxed out far before filling up even 8GB. The advantage is going to come from other programs running not being paged as often. So, you will be able to allow the computer to do more multitasking, which it already does, it will just be smoother.
But, I'd say go with these sticks, the timing is a little slower, but the frequency is much higher. And, it'd be like $320 to max out that board right now, so adding RAM every once in awhile would be perfectly doable.
I'd say start with two sticks giving you 16GB now, then go from there. It'll help keep the costs of the system down for initial building.
Also, for some reason on NewEgg ... buying individual sticks (multiples) is usually cheaper than buying kits ... even if it's the same sticks.
Here are some of the components that I have:
