Are they speedy? Cause if so, I'd agree.. I would probably injure them or atleast bump them around a bit if they got loose and I was in a fluster to catch them, lol.
I think you can hold whites. I know you can hold greens if you rinse the salt off your hands beforehand. I've always wanted red eyed treefrogs, but I don't know anything about them really.
Peacock days are my first choice.. Unless I find out they are way out of my league, lol. After that, I'd just as soon go for red eyed treefrogs or those frogs with the parachutes for feet.