Upgrading 3 things - Motherboard..Memory..Processor

I am looking to upgrade my computer from a AMD 3500+. I am looking at:

Intel E6750 Dual Core processor http://www.newegg.com/Product/Prod [...] 6819115029

GIGABYTE GA-P35-DS3L LGA 775 Intel P35 ATX Intel Motherboard http://www.newegg.com/Product/Prod [...] 6813128059

2 Gig of Paired 240-Pin SDRAM DDR2 800 (PC2 6400) ??????? (For around $65.00) This is where one of my problems is. I need to find out what is the best timing with 4-4-4-12 or 4-4-4-15 or 5-5-5-15 ? I do not plan to immediatly overclock, I just would like to have that option built in for when I do need to from the games that I am playing.

Thanks for the advice in advance.