I didn't mean to imply that he had to switch to something other than ISIS, or even that he should switch. But if he was to consider switching, possibly due to ISIS' less-than-stellar reputation for durability, now would be a convenient time since he'll be swapping the bottom bracket anyway.

Not that a failed bottom bracket is a catastrophic thing. I mean, they usually give plenty of warning before they die completely. They generally won't leave you stranded and you'll have time to find a replacement if you notice your bearings starting to rumble. And on the bright side, ISIS bottom brackets can be found cheap, so even if you go through a few of 'em, it's still cheaper than replacing your crankset.