Im gonna to get a new processer, mobo, and DDR2 to replace my current Mobo, processer, and ram(currenlty a P4 630 3.0Ghz ,2.5gb DDR400)

I've already decided to get an E6400 snice i can OC with the stock fan to 3.10 not having to buy a 6600(120+) but i lost on what mobo to get there just so many! I am waiting for the RD600 mobo coming out soon (snice i wanna crossfire my cards) but if theres something better out now please point it out. Another question is what ram too get each mobo supports different DDR2 ram i am currently looking at get 1GB of cosair XMS2(800,667,533) i would like to get 800mhz mobo and if possible a mobo that supports 1066mhz.

Any help would be appreciated

Go with Gigabyte's mobo.

Either

1) 965P-DS3 (RAID)

or

2) 965P-S3 (NO-RAID)

These 2 boards are one of the best overclockers for C2D, and one of the cheaper ones too.