I'm in the middle of a big drivetrain repair/spend on my Enduro, and have decided to ditch the outer ring and switch to a 36-26-bash combo. Using this combination means I can drop down my rear mech to a medium cage and can shorten the chain somewhat, so won't have a need for a chain tensioner.
My logic is that my Enduro is my fun bike, and I never use the big ring on it anyway, so it's just wasting space.
The rear mech is still on order (XT Shadow '08), but when it arrives I'll fit everything and report back too.
al