New System Build Out - First Time Overclocking, need some help

Hello, everyone I'm building out a new system, I'm pretty sure that I am going with this set-up:

Processor: QC6700
Board: GIGABYTE GA-P35-DS3L LGA 775 Intel P35
System will be water cooled.

I'm looking to play around with some over clocking (For the first time), will be running 32 Bit Vista. Probably will just Dual Channel 4 GB on this board and have it ready to go.

Question is what should I be looking for spec wise for Memory if I want to do some overclocking?

Any suggestions on specific chips would be great as well?

Thanks for the help, this forum has been a good resource so far, for all of my questions.

Well under 32bit os your system will only see 3.5gb. Might be less depending on gfx.

I think I saw some nice g.skill 4gb kits either pc6400 or pc8000
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231148
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231145