Most of these configurations are a little too high for 200GB

What I'd recommend is something of that sort:
P3 800
512MB SDRAM
20GB HD
We mainly use a customised version of Redhat Linux 7.1 which has been rock-stable and fast for months.
Using such a configuration you can push quite a lot more than 200GB so you've room to grow which is very important.
Hit me up on ICQ 17021242 if you have any questions, please.
Thanks,
Gernot
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