Agreed, I have never seen drives fail due to rebuilding parity. You can have multiple arrays if you want but it's more overhead for the card and chews up more space. Anyways, I can't justify paying $$ for a high end card when I can do what I need though software. Honestly, I was never a big fan of software raid but it's come a long way and ZFS implements it the best...my opinion. This leaves more money for me to purchase external sata/sas hba's and DAE's. I have a few people running openfiler and iscsi on commodity hardware using software raid and they have been happy for some time now. If I had my heart set on a reasonably priced card, instead of other options, I personally would opt for a 12/+ port 3ware card. I see better IOPS performance on there cards and they are available easily over the Internet. If I just had $ to throw around I might consider a MD100 and just add other unit/s when needed as they are expandable.