ya but i want a turtle that will grow acustom to me. and that are energetic and colorful. not one that sleeps half its life. ive heard that musks are noctornal and all around boring from a couple websites
Hmm I've kept loggerhead musk turts and they were pretty active...but if you want something interactive I'd go with a tortoise, most aquatic turtles aren't very hands on "pets".
florida red belly will get very large and not suitable for a 40.
I think your best bet is a russian tort... If you live in NY you can go to the White Plains reptile show and pic one up for anwhere from 55-85 at the end of the summer. They are very hardy, personable and stay small.