Thanks for all the compliments everyone!
I've never had problems with otos when I first purchase them, my problems arise much later down the line when the females get egg-bound--so I guess I can't really comment on that. So far they seem pretty hardy but, from what I can tell, the person I got them from spent a fair amount of time acclimating them. They supposedly like softer more acidic to neutral water, high aeration and warmer temps. I'm curious to see what kinds of algae they prefer... got plenty to pick from right now.
I'll be keeping my eyes out for more of these cuties, so if I hear of any larger shipments I'll be sure to give a yell.