If I was to get NEITHER of the above audio systems and therefore have the regular standard audio unit only, what would be some recommended audio systems I should consider installing aftermarket? (Money is not too much of an object, but I'm not into volume in audio - quality of sound is much more important than volume. I don't turn up the volume that high.) Different features/flexibility might be more important, for example, being able to easily play MP3s or hook into another digital/satellite audio network, etc., plus good reception both AM and FM.
Bud H