Hardware spec for Exchange2003

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.
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David WilhoitConnect With a Mentor Senior Consultant, ExchangeCommented:
you're definitely on the right track. 40 users, and 60-90 GB of data? Wow, if they are using that much, you should start thinking of some archiving techniques. Anyway, yes, if you can afford it, go for the 15k RPM drives. Also get a battery backup for write-back caching, or else when you enable it you'll get horrible performance. I'm speaking from experience here. I'm using Compaq servers, dual 2.8 ghz, MSA 30 external storage devices, and the database and logs reside there on 0+1 partitions. System drive is on the internal controller, MSA 30 is on the 5i controller. Now that it's configured properly, no thanks to my Platforms group, it flies :)

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