That's why I like SBS 2011 Standard with good old SAS drives in a RAID 1 / RAID 5 configuration.
RAID 10...Always lol. Appears to be the new standard in reliability and speed. No parity calculations, faster reads and writes, fast rebuild times. Doesn't need a beefy RAID controller either with no parity calculations being done.
RAID 1 seems a bit slow for SBS 2011 Std. given all the things it does.