I have a 2002 Nissan Altima 2.5 SL with the Bose stereo. I am looking to replace my head unit (mainly because I want to listen to audio files from my Blackberry and iPod without using an FM Transmitter). I have done some research and found a fairly inexpensive unit - Pioneer AVH-3200DVD. I am just trying to figure out if this Pioneer head unit will make the sound better or worse than my Bose stereo head unit.