'E' because i think it would be better to wait for the creases to be iorned out. Theres a hell of a lot of software for OS9, and although OS9 apps will work on OSX, i think it will be terribly slow. but if the speed and compatibality issues arent a problem, id upgrade preety soon. or i might just do a partition, and keep em both.
But as long as OS9 is productive, id stick to it.