O. hummelincki and if you found one and don't want it I DO! It is a medium sized animal and would do very well in your 75. They are often day active, very hardy and I highly (obviously) recommend them.
I do think that is what I have now. I was lucky and my guy in Marathon had another animal. I just got him yesterday. I will start another thread as soon as I figure out what to name him. Any suggestions? I am not very name creative.