Just got my 3x1.5TB drives (Seagate Barracuda 7200.11 ST31500341AS) today, did some quick benchmarks with Highpoint RocketRAID 2310 4 port controller. The RAID5 is going to be initializing for another 26 hours so will do those benchmarks tomorrow.
RAID0 - Quick Bench
RAID0 - Long Bench
RAID0 - Quick Bench
RAID0 - Long Bench