Keep the original speakers, I kept the rear speakers. My JVC is now connected to the TV for watching movies from DVD. I did replace the 27" tube TV last yr with a Visio 26" LCD I found on sale. 12volts was fairly simple since my stereo/tv was in a cab with the furnace underneath. Tapped in there , or at water pump, and used a 12v noise filter on the power. Put the sat and radio ant in very top of cabinet and both work fine. Going to mount on roof when the rain and snow and wind from global warming stop.
Helped a neighbor who wanted surround sound in his trailer. Never dry camps so we bought a reasonable set of compuer speakers, 5. 1 surround with a powered sub, for about $90. 00 and connected to the headphone jack on TV. Can adjust volume with the TV remote being careful not to go full volume and cause distortion. Speakers do an electronic simulation of true surround, but works pretty good and the sub gives the kick needed for movies. Speakers were for gaming, lots of power and bass if you want it.