That would be a fine enclosure. All you need to do is let LMCE manage it. If you are going to RAID it, let LMCE set up the RAID mirror from the webadmin. Use Pluto's file structure, and after you start saving media there, LMCE will samba share it for the windows machines. SHould be able to do everything you want it to, just let LMCE work its magic.
Regards,
Seth