I recently installed Sony component and Sony coaxial speakers on my 2012 Altis. I don't remember their model but they're nothing too high end. The component is N1620 or something and the coaxial are 5 way 90W RMS. They are being powered by a 4 channel Pioneer amp.
Currently I have the stock navigation unit installed. I wanted to ask if it's worth getting something like a Pioneer AVH 275BT or 2750BT. It will cost me Rs. 20-25,000 extra depending on model. Will it make a noticeable improvement in sound quality? I listen to songs using my iPhone connected via aux cable.