I haven't run the Ice but have heard good things about it.
The White Rhinos that hermied on me came from a seed batch that was released ~3 years ago. I have seen enough grumpling about that batch that there's NO WAY Nirvana is not aware of the problems, and it would not surprise me if subsequent releases were more stable.

Funny you should guess that number, because including the males I hold for breeding, my strain count is almost exactly that. Weird. You win some free plant counseling services!