That's brilliant Martin, thanks for that.
I've just ordered this - http://www.icydock.com/goods.php?id=114 - Just waiting for it to arrive and then I'm going to throw 4 x 10K 146GB HP SAS drives into it to run my VM's. I like the fact that SAS is full duplex.
I've got a 3ware 9650SE RAID controller too which I wanted to use but seeing as it only supports SATA I thought it would be more cost saving to use the P400 due to the fact I've got a shed load of SAS drives. I'll use the 9650SE for a data RAID array.
I wonder though about power consumption for the P400. Is it more power hungry than newer cards?