I have an O'day 28, and did exactly what you are proposing. However, the guy who owned it before me did a drop down case with four screws in the ceiling, which put the screws through the deck. Not a great idea. So I built a box in top of the little teak box in the back, put some hinges on it and put the unit on the back with the face on the front. It flips down to work on, and is all out of sight except the control head when latched up. I can send you pics if you like. Anyway, the stereo I bought from WM has Ipod and Sirius and all that, as well as you can run a waterproof remote control all the way back to the cockpit, and have complete control right next to the wheel. Then you don't have to worry about throwing the little remote into the water accidentally like I ALWAYS do.....