need a ram suggestion

[Dorkenstein]

I am curious how I should set up a new set of DDR2 sticks. I am aiming for 8 gb but I don't know if it's best to buy a paired kit of 8 gb all together or to buy two separate 2x2 kits. Hope this isn't confusing. Any suggestions on superb ram for video work and gaming that will add up to 8 gb? Thanks, I might overclock it as well but I don't know if I can OC and use the on-board firewire port I have.