Audi Gamma Stereo - comments??

[Ryan and Marjorie Fischer <rmfischer@sk.sympatico.ca>]

OK - I have seen lots of discussion on Audi/Bose systems and how
bad/good they are. 

I have an Audi Gamma unit in mine.  I am not particularly thrilled with
its sound AND and I can only turn it up...if I turn the volume down it
cuts out and I have to turn the radio off/on again.  Spoke to the dealer
and his procedure for fixing it would cost me the price of an
aftermarket head unit.  

My questions:
- My 94 90Q has a unit labelled Gamma - is this a Bose system?  
- will simply replacing the head unit on my car work or should I
consider an entire system replace (speakers et al)?

Ryan
94 90SQ