What do I need and what kind of turtle should I get?

I am looking to get a semi aquatic or aquatic turtle...I have a heat basking lamp from my previous bearded dragon (was eaten by my other beardie, giving the still living one away)....what type of turtle should I get? I got today... 2 UV bulbs, turtle dock, conditioner for the water, waterfall filter..I believe thats it, and turtle pellets, what else do i need?