I installed a stereo in the overhead compartment above the galley, that can play CDs, MP3s, has an IPOD hookup, AUX port, and USB port that can charge cell phones, etc. Below that I installed a kitchen under cabinet digital TV with DVD player, and a pull down/swivel 10 LCD screen. I installed two speakers on the inside of the boat in the holes already there from the factory, that were to be used to gain access to the bolts for the lifeline stancions. Not seen here are two 3 waterproof box speakers in the cockpit, mounted with brackets on the stern rail. Those can be easily removed for storage when not in use.

That blue flexible conduit stuff is great. I used it in several areas on the boat. Once installed, its real easy to run wiring.