Yes, bob, more HDDs will lower your lag and wait time by a margin. Don't expect amazing "OMG 2.5 second wait gone" results, but you will see a difference.

As far as Phenoms and the rest of the debate there is concerned, I bought a 6600 based on the price. I know I'll upgrade in 1.5 or 2 years and when the time comes, maybe we'll have octocores. I just wanted to avoid spending $400+ on a proc for a machine that I don't do amazingly high-end gaming on. I only run one vid card ATM so SLI is not relevant. Yet.