I find the Bose system in my GT to be 'adequate'. It really suffers without a subwoofer, the low end just doesn't have much punch. Too bad, they could have hidden one under the passenger seat maybe, as others seem to have done.
It also lacks any seriously control, it REALLY needs a midrange control. Bass and Treble? That's it? Why not give us say a five band EQ, in this day and age.
The centerpoint thing is a joke, washes out the music to make it all feel 'swimmy' around you, huge loss in detail with it on.
Not the worst stereo I've heard, for sure, but a 'premium' stereo, I've definitely heard better.