Best answer selected by Bacon12.
nI've since learned that the 300G WD Velociraptors I have in the raid array are SATA 3 anyway... Sooo... The issue is moot anyway... Man, I sure wish SSD's were not so darned expensive! I ran the Windows Experience Index app, and got a score of 7.9 accross the board, the sole exception being a 6.2 on the Primary Hard Disk category... I'm told that I should be happy with the 6.2, as most people, even running a raid 0 array are getting 5.9... So, I'm just going to be happy!
nThanks again for all the responses!