I have not replaced the jensen radio/dvd unit yet, but I have replaced all of the speakers. I picked up 2 pairs of sony 6x9 speakers on clearance. I installed those in place of small cieling speakers, just had to cut the holes larger. The outside speakers I replaced with a pair of polk. I cut a hole in the outide wall, installed cargo door that opens to a 36" flat screen. I fished hdmi and rca cables thru the underbelly between there and the entertainment center to feed audio and video between the 2 areas. The outdoor tv/cargo door is under the kitchen couunter area. I need to make a shelf in there for the bluray player and directv box. I have a 12v powered subwoofer that I had planned on installing in that area, but now with the tv and other stuff there is no space. Plan b is either between the bed and entertainment wall, or in the underbelly.