thanks for your replies. Ive managed to send the drives back for a refund
a very good seller lol :P
I've bought some WD RE4-GP drives, well, eight of them lol
all installed just need a RAID card, im thinking of the ASR6805 by Adaptec, although the price is very off putting! I like the idea of the software where you can have an monitor and control the RAID setup from Windows.
Not quite sure what other makes/models would be good? It needs to be an 8 port controller capable of RAID 6...
With RAID6 any 2 drives can fail I'll still have all my data. Its going to be used for storage and streaming HD video and movies etc.