Best Memory for Asus P7P55D-E with i5 650

[Furabio]

Hi there guys! I am in an urge to upgrage my computer and I would like to go to 8gb ram at least.

My computer now has 4gb ram with a Corsair Dominator 2x2Gb 1333mhz.

Like I said, I want to improve it to at least 8gb, but I don't know what is the best for it! Can someone help me? Like my thread says, my computer have the following components:

Asus P7P55D-E motherboard
Core i5 650 processor
Corsair Dominator 2x2Gb 1333mhz memory
Crucial 128gb SSD

Thanks!

 

[Furabio]

Nobody?