If you have to get rid of one of the tanks, then I'd say that you either have to keep the Panther and get rid of all the others, or vice versa. Personally - I'd get rid of the Panther if you have any ideas about getting more fish because obviously it will eat anything you put into the tank.
With marine fish, I know there's a lot of cost involved (ie fish are expensive)...that's another thing to consider - which fish(es) are the most expensive? If the Panther is as expensive as some marine fish I've seen ($500), but you can get damsels for $7, then maybe keep the Panther. But again, you're probably not going to be able to have any tankmates for it, so that's the ultimate decision to make.
I have a 59gal FW setup right now that I need to do a lot of work on and I'm starting to grow a little complacent in the hobby again (happened a few years ago)...I'm wondering if I should sell the tank and be done with it. Or I could just change the filter cartridges (or buy an Emperor 400 like I was planning), do a water change/gravel vac, and go buy some more fish. At this point...I dunno.
