Oh. My mistake. I thought you were looking at the E7500 CPU, not the E8600 CPU. That's what the configurator webpage showed, but I guess that was the default CPU, not the one you chose (I should have read your post closer - I just went directly to the HP configurator).

I can't tell you which would be better: a dual 3.3Ghz w/6Mb cache or a quad 2.3Ghz w/4Mb cache. My gut tells me the quad, but I really don't know. Hopefully somebody here can give you a definitive answer.

I was incorrectly thinking you were considering the 2.8Ghz dual w/3Mb cache. I'm fairly certain the quad would beat that handily.