At 400+hp, What kills A904s?

I'm sure they're well worth it for what you're using them for, but I believe that most of the readers here are more interested in an economical way to have a reliable transmission; since most of their cars are street driven. (As far as you having 'zero problems', the jury's still out on that one!...but keep beating your balls and things might improve!) My intent in this thread was to inform the op what methods I would suggest to make his trans last a little longer; since I believe it's not long for this world, and to recommend the 727 for street beaters as the best choice for longevity; cost considering.