Media Storage?

Hi,


My main question is about types of file shares and streaming with XBMC

Does it matter if I use a NFS share or is SMB ok?

I am looking for some advice from anyone who has had experience setting up a media file server (a place to store my videos etc)

I currently have a stock standard PC, running software raid with two 3TB and two 2TB drives, Total of 5TB [/align]of RAID 1 storage.

I run XBMC as my main HTPC, this is installed on a 120GB SSD in the PC mentioned above so all my media is stored locally on the XBMC machine.

I am wanting to create a file/media server with redundancy storage.

I have heard that unRaid is really good but yesterday I read that it is not yet capable of 3TB and 4TB drives, seen I have 3TB drives I need a solution that will work with them.

I have also seen software called FlexRaid, and that runs on an OS such as Linux or windows... I have no idea about the performance or reliability of FlexRaid.

What about FreeNAS?

Could someone suggest any solutions for me?

I havent got a big budget. I will most likely use old hardware,
ie.
MB = P5Q SE/R
CPU = Intel® Core™2 Quad CPU Q9550 @ 2.83GHz

Any suggestions or tips would be great...

Should I be buying new hardware, i.e. new Motherboard and CPU?