What are some optimal hardware specs for an exchange 2003 server that will have 40 users and between 60 and 90 gig of data (I would want to plan for a max or 120 Gig). I expect I would want a RAID 1 for OS and another for LOGS. My pub.edb is barely used (20 MB right now, compared to 15Gig for Priv). I would also expect that I would want split backplane on one controller an a second controller for the 3rd or 4th RAID. Is RAID 1 or 5 better for the PRIV? Does 15K RPM make a big difference from 10K RPM?
Thoughts? I am trying to stay under $20,000 and on a single server. I am currently buying Dells for my other servers, but am not vendor bias.