Shower valve

Has anyone changed the shower control valve? I would like to have something that worked better and was closer to a residential unit. It is hard to adjust the right amount of hot and cold water flow and the handles turn in the opposite direction to a house hold unit. The single handle shower control valve would be nice.

I did buy a new chrome one from camping world because of the way the hot and cold knobs turned in different directions. The new one was all brass inside. I think this is the one and it works great.

http://www.campingworld.com/shopping/item/chrome-finish-shower-valve/3995

When I got my Wicked Kitty it had a nice shower valve cover. A rounded cover that made the installation look nice. My valve went bad and the dealer replaced the shower valve. The bad thing was my cover disappeared never to be found. Crap