I have been working with a few HP Prolient DL 320 SATA servers. The price was right on them and they have decent specs. The issue I had with the last round of Supermicro SATA box’s weren’t the supermicro box’s them selves, but the SATA RAID cards that went into them. They would fail much more than their SCSI counterparts. Also the array controllers would not rebuild without crashing computers. We tried several brands. We are using 3ware for new deployments of older chassis SATA servers. They seem the best out of all I have seen. They were a crap shoot. These HP box’s seem to rebuild fine in our tests. Time will tell if they drives hold up, but so far I think HP finally got it right with a low end non SCSI RAID system.