BOse radio issues

whats up have a 97 and a 96 max trying to put my aftermarket touch screen flip out in , my car came with bose with the seperate amps on each of the 5 speakers , i know they make an adapter so u can use the bose equippment with the aftermarket deck but i heard it kills the sound quality. Ne one have experience with this . also will the wire harness for my tv that i used in my maxima without bose be the same harness for this car that has bose?
thanks for ne help in advance