Having had the CB and then upgraded to a CBll with extreme DACS, along with the DaViD, the Theta Data lll, 4 Vandy 3A sigs, the VCC 5 and two VSM on the sides, and two 2wq's I feel very confident in saying don't bother to upgrade your CB to improve your music listening.
Keep it as your HT processor, it is terrific for that. Then take your $4000 and buy the best 2 channel pre amp that you can find with a AV pass through. For that amount of money you can buy used or new and get a pre amp that will out perform the CB by leaps and bounds. You also need a CD player or a TT, the DVD player is great for movies but, for music, get a CD player or TT.
Keep it as your HT processor, it is terrific for that. Then take your $4000 and buy the best 2 channel pre amp that you can find with a AV pass through. For that amount of money you can buy used or new and get a pre amp that will out perform the CB by leaps and bounds. You also need a CD player or a TT, the DVD player is great for movies but, for music, get a CD player or TT.