RAID setup?

[JET]

I prefer it to run Win7 as right now I am using media player to send files to a PS3 and I also have a HTPC that sees the most playback. I am curious about the WDTV, if that can take the place of the PS3 then I am open to that.

HTPC runs Win7 AMD phenom 2 @ 3.8ghz with 4GB ram and a 128GB SSD.

The computer downstairs stores all the files, but it also used as a desktop. It is an i5 3570k, 16GB ram, 12 TB of disk space once my red's get here, etc.

All the movies are HD, with most files being 8-24GB per movie. Everything is hardwired on a gigabit network.

All of the file sharing works great, except many of the new movies have Cinavia protection and the PS3 has issues playing them. The HTPC has no issue with them.