i looked around here and might be blind.....but i didn't find anything about adding a sub or changing the head unit with the Bose system....
my concern is the anti theft, and steering wheel controls can you add a sub to this unit or should i swap it all out and put in my Memphis EQ speakers and Kenwood amps?

also wondering if there is a brand of head unit that is more compatible with the techno stuff on these cars (Ahhhh the days of my basic S15 )
thanks in advance for the help
yes pics coming soon

You could basically go with a double din head unit and depending on what you want to spend the possibilities are endless.

As for retaining the factory steering wheel controls use
http://fitguide.installationexcellen...goryId=29#6945

if you are going to change the headunit i wold suggest swapping out all of the components while you were at it.

I just did all of mine and my Nav Deck should be in today (not holding breath)