Nice article. Two things I'd like to mention. One is that I hope you can add something about software RAIDs and their incorporations across different OSs and most impotantly what happens when the OS needs rebuilt, or the disks get transferred to another PC etc.
Second, I've been working with RAIDs in our office for years now on Dell PowerEdge machines and needed to benchmark a RAID50 vs a RAID10 and found that RAID10 is vastly superior except a hardly notable difference in CPU usage that could be completely unrelated. The short benchmark and details are posted here.