Latest version of RST does support UEFI boot, but not on this board (requires later chipset and RST OROM 10.5). Hardware RAID should be OK, see http://www.intel.com/support/motherboards/server/sb/CS-031158.htm for details.
AHCI mode should also support UEFI boot, but you wouldn't need to do that unless you're using 3TB or larger physical disk.