How much do you want to spend and do you plan on overclocking?
If you don't mind the money:
http://www.ncix.com/products/index.p...tu re=Corsair
But this is just fine:
http://www.ncix.com/products/index.p...tu re=Corsair
Just make sure it's DDR3-1600. I use Corsair RAM and it's great.