This video may have already been referenced in this thread, but it is a good one and worth repeating I suppose.
http://youtu.be/7_tsY2abJes
IIRC, Stihl came out as the best chain, albeit by a margin small enough that makes it hard to justify the extra cost. I think it was Oregon that came in a pretty close second at about half the price as Stihl. (I suspect Carlton is pretty good too.)
Very good post, by the way.