This article from Anand seems to suggest that RAID-0 only gives very small advantages.
http://www.anandtech.com/storage/showdoc.aspx?i=2101&p=11
Look at the benchmarks, and the conclusion.
http://www.anandtech.com/storage/showdoc.aspx?i=2101&p=11
Look at the benchmarks, and the conclusion.