Storage array: Bare drives, SS, RAID, SSD, or other?

[Viceroy]

Obviously the basic hierarchy would go SSD(Intel x25-m; OCZ) > 10k(Velociraptor) > 7.2k(Spinpoint F3; Caviar Black; Barracuda) > 5.4k(Caviar Green), but I am curious to see the relative performance of these drives when short-stroked or put into a RAID array so that I can better decide which combination of storage devices would be of the greatest benefit to me, with price and hassle of course factored in. General ideas are welcome, but I believe what would help me the most are benchmarks and numbers and graphs.

Thanks.