We have a mixture, a 15" combined TEAC lcd unit in the wheelhouse which also has the nav computer feeding into it (old desktop unit, Win98 and nav software with a feed off the gps). It will play dvd's. etc. It is plugged into an inverter.
In the master bedroom we have a 19" Phillips lcd with a separate dvd player. This also is plugged into the tv antenna and the digital tv while in the slip. This* is also the cd player for the bedroom.
In the lounge we have a 42" Hyundai plasma, which is plugged into*a 12volt dvd, cd, am/fm auto head unit. We really only use this tv when we have shore power, plasma has a fairly high power usage compared with lcd.
We have a huge stack of dvds to watch, plus several hundred audio cds. We like our sounds and pictures and are setting up our vessel so we can enjoy our interests.