Server hardware - UK based

[Gary Stainburn]

Hi folks

I'm in the process of buying a new 1U rackmounted server for work.  It will 
run my 

mail server (exim/dovecot) with approx 120 users and 1400 emails per day with  
Anti-virus done by Sophos/Sophie and Clanmav
Apache with PHP and Perl CGI accessing a Postgesql database with approx 3000 
hits per day.

I'll be running FC5 on it.

I'm looking for people's recommendations and experiences. Any I should go for? 
Any I should avoid.  

I'm not bothered much about brand name. Build quality and performance are what 
I'm more concerned about, specifically the web server and therefore the SQL 
server - the schema/data contained with will become quite extensive.

The areas I'm unsure of are things like:

comparisons between Celeron and Xeon processors
benefits/drawbacks of multiple processors
benefits/drawback of RAID
type of HDD and their performance.
-- 
Gary Stainburn
 
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