dhayek,
in my experience, there arent that many people who mod their 360's sound system.
probably because the tubi exhuast is such a better mod
the 360s that you DO see with improved soundsystems, are usually ones that someone really 'butchered' the car, as you aptly put.
on 6speedonline there have been numerous posts of 360's with sound systems, and they all involved destroying the beautiful interior.
get a tubi exhuast, and if that doesnt do it for you, get straight pipes.
i love the 360 sound, i drive my friend's all the time
not as F1 high pitch as the 355, but still one of the best.