Looking for advice on which 8TB 4 Bay 2 TB set up to get

I'm making a feature documentary. We will need 6 TB of space. Up until now we have managed on single 4 G raid TB drives and have had the drive copied onto another drive. We have been using G Raid 0. Just lost a drive.

Ready to invest some dough (we have no budget so price is important) and buy a 8 TB - 4 bay 2 TB array.

I have seen this G Raid set up http://www.tekserve.com/store/146/Desktop_RAID/-10068. Can't find it on B&H site

and Drobo which is less. http://www.bhphotovideo.com/c/product/620486-REG/Data_Robotics_8TB_Drobo_4_...

Any recommendations? Remember price is really important as is reliability and customer service.

Thanks!