I had the Bose setup in my GTX and the one thing I did that made a world of difference in the beginning was simply swapping out the stock HU with only bass and treb for another stock unit that had the 5 band EQ in it. That made up for some of the lost sound in the Bose speaker set. Its not aftermarket quality mind you, but if you are on a budget and want a simple upgrade to your stock setup, that is one thing worth looking into.