[CentOS] advice on storage for media storage/streaming server

Hello,

I would like to use centos 6.3 to build a media server with 7 2TB drives 
and would like suggestions on the storage aspect.  This is going to run 
mediaplex and function only as a media storage/streaming server.

1. If I didn't care about redundancy, would ext4 handle the size of a 
raid 0?


2. If I did go with the redundancy, what raid level should I use?


3. Should I use LVM?  Why?


Thank you in advance for your thoughts on this.

Phil