Can't go wrong with Corsair. Corsair & Asus are like peanut butter and jelly - check out their website and use the memory configurator. Matches RAM to mobo and even provides links to ZipZoomFly and other retailers to purchase. I'd imagine since you're not overclocking, most 5-5-5-15 ram should suffice.
However, if I wasn't overclocking, I don't know that I'd spend the extra $50 - $70 for the deluxe version of this mobo. Alternatively, you could go with the Gigabyte DS3 for the nearly the same $$ as the P5B vanilla and still have a nice OC board if you wanted to play around some day down the line.