This is the hardware I have:-
I used PC Pitstop @ http://www.pc-pitstop.com
SC-MSATA-PCI 4-Port SATA Controller w/ext4X connector 2
SC-SAT84XB External 8 drive SATA II Enclosure w/4X
3 SAS-7070-1M 1m External SAS 4X to 4X Cable x 2
4 HDI-ST3500630AS Seagate Barracuda 500GB SATA-II HD x 8
One thing to note is I bought SATA cards and not SATA2 initially as shown above, you will want SATA2 cards (and they do not need to be raid cards, although it will do no harm if they are)
Steve.