Thanks for the replies, guys!

I'm not really hosting many sites that get too much attention. Couple sites w/ 250K hits per month and everything else doesn't even add up to 100K hits/month.
I think most of my resources are used on MailScanner/clamav/spamassassin.
It's not terrible on the Xeon dual 3.2, but intensive php/mysql sites don't respond 'like they used to' if you know what I mean.
Combine this wit the fact that I'm a couple 10.x revs behind on Ensim, and it had me thinking about possibly upgrading.
Any thoughts on the dual 3.2 Xeon's vs. that dual core listed? (Basically looking at The Planet's latest sales promotion emailer.) Pretty much a wash when you compare the two or ... (Analyzing the cost to benefit ratio.)
Thanks again!