[Zope] [HELP] Choice of a NT server

Hello, I have a question about wich processor/memory, etc.. i should use in order to run my Zope Site : In fact, i have no idea about the style of server that i should buy in order to run my site properly. My site (a commercial extranet) whill be used by 300 users, and i do think that there will be 80 users concurently (simultaneous). They will just browse the Web pages and sometimes download files (MS Office). I didn't manage to find any information about that. Can someone help me ? I uses Python 2.1, Zope 2.4.4 and CMF. My ZODB size is 200 Mo. Thanks in advance. PS : Excuse my english Frederic.