What would you recommend?

You may have noticed that I haven't posted any updates on the home network lately. I decided to halt my current plans and take another path. As a result I am looking for a "super server" of sorts. On that will  virtualize most of the loads I need to run and also be expandable for many years going forward. I posted a similar request to some internal aliases and received some good advice and suggestions. I would like to open it up a little thogh so I am posting the request here as well.

The goal is to virtualize 6-10 of the PC's that run in the basement to one machine, then use SCVMM and DPM to manage and backup. I should note that some of the workloads are pretty insignificant but I will be moving two DC's, an Exchange server, a SQL Server, and a Web Server into the VM environment. SQL is not heavily used but Exchange and the Web server are (I host about 30 domains).

My thoughts are to get a machine that will be used for a number of years (I have PC's that are 10+ years old that I am going to decommission). My thoughts are to get a machine with the following minimums --

Dual Quad Core CPU's

16+ gigs of RAM

onboard SATA RAID

eSATA port

SCSI is an option but I would prefer to stick with SATA

on board Gigabit Ethernet (required and preferably two ports)

I am quite comfortable building my own systems so I welcome suggestions on specific MoBo's or even complete server systems. Price is a consideration but the system is going to be pricey no matter what so I am keeping an open mind.

What do you suggest?

Cheers!