Thanks for all the tips man and yes I'd go with new drives. I'm very happy with wd to be honest, never had a drive fail from them (not the same as for Seagate) but anywho. Okay I was thinking on running them raid 1 so that I have a backup of the drive.
Okay thanks I've heard plex can really hammer your cpu for the encoding tasks specifically with 20mbs data stream.
Sorry Mr moderator for the wrong groups, it's been a while