In Big Enterprise environments we stopped using raid 3/4/5 a long time ago (Tons of reasons, start here). And even Raid 6 will be dead in the water:
http://queue.acm.org/detail.cfm?id=1670144
Card wise you had bad luck but storage should be done with JBOD Array & 2 SAS HBA's in Multipath Config and NO raid card. With Solaris and ZFS on top you'll get protection against URE, silent data corruption, bitflips etc. (Basically against all the RAID related crap). And you have protection against HW failures on every level (even if the whole storage server crashed).