120 ReeferMaddness,
Not sure about the kleins, however, I know that my friend put a Chaetodon ulietensis (double saddleback) and it cleaned out the majano for him. He had a 180 reef.
Afterwards, it never touched any SPS however, some zoos. Now he kept the fish well fed afterwards. This was eleven months and he had to move so not long term.
Nicer fish in my opinion.
Good luck.
Cheers,
Bruce