Here's a little heads up from a breeder (not a fog breeder but a fish breeder and some other kinds of animals as well). When you read up on a type of animal (doesn't matter what kind) your going learn something really quick when you actually get the animal. As much as you spend reading about them, most of your knowledge comes from owning them. I'm not saying don't read up on them, but get ready for the learning experience of your life. Each animal always going be different from the other. So it makes it hard to tell people what to expect through online.
As for picking out your new little friend(s) go with the one you think you want the most.