Thanks again for everyone's input, I'm learning a great deal with all this information, therefore much appreciated.
I think my system is quick, but I want work on the HDD department to get bit more performance, but I don't benchmark anymore, So it would have to feel quick in general use for me to notice the difference,
I will be using onboard RAID as I don't want to spend money when I got one onboard, saying that I got given 2 x 36GB 2.5" SAS SCSI drives the other day, so I have been looking on auction site to see if I could get a cheap SAS controller.