What speed memory for my mobo/combo?

[donfm]

I am going to get a GIGABYTE GA-EP45-UD3R LGA 775 Intel P45 ATX Intel Motherboard.

with an Intel E7400 or E8400 Core Duo processor. My question is what speed ddr2 ram should I

use for best results with this combination?

 

[donfm]

No responses...hmmm

Ok let me rephrase this...with the E7400 what memory speed should I use so I can overclock?

For the E8400 what memory should I use so I can overclock the best?