Isn't the performance in http://www.xbitlabs.com/images/storage/3ware-8500/sr-1.gif limited by the PCI-bus? If you had 8 drives the top speed would be the same? Shouldn't that be pointed out?
Good stuff,
but has I'm not a specialist about raid array I would have greatly appreciate a reminder (or a link to an article published longed ago on your site) about what raid 5 and 10 are. I think I can guess at least(10 = 1+0) but I'm not pretty sure. Reminder would have been valuable.