Running some tests using IOMeter (preferred the GUI to this one over SQLIOsim) and using some of the predefined options here's the results:

ON a 12-disk, RAID 5, 1 hot-swappable spare, this uses 1 worker, 40,000,000 sectors (20GB file)

MAX IOPS - uses 4KB transfer request size, 100% reads, 100% sequential dist.:

TOT IO/sec: 121,432

Total MB/sec: 479

Average IO Response Time: 0.13

MAX IO Response 1.85

CPU: 26.5

MAX IOPS - uses 4KB transfer request size, 100% reads, 100% sequential dist.:

TOT IO/sec: 58,294

Total MB/sec: 227

Average IO Response Time: 0.27

MAX IO Response 86.9

CPU: 12.1

MAXIOPS with 90% read, 10% write ratio - uses 4KB transfer request size, 90% reads, 10% sequential dist.:

TOT IO/sec: 7000

Total MB/sec: 90

Average IO Response Time: 2.28

MAX IO Response 37.2

CPU: 27.6

I don't really know if this is good or not, when i ran it against on of the other RAID 10 arrays the numbers were much slower...so i assume this is good - Is this considered ok?