I could be wrong, but wouldn't you wear a 3/32" 8/9sp chain alot faster with a 1/8" drive train? I know even getting my chain wip to work with my cog which is 1/8" does not work perfectly since the chainwhip has a 3/32" chain..
I use a PC-1 chain , and the Miche track chain on my other bike. Since I run 1/8" drive train I figured I should run a 1/8" chain. Both are definately cheaper then a high end shimano chain, and being wider then a 9sp I figure will probably last a bit longer.