I'm not an audiophile but for a few years I made a living installing systems so I do have some experience. I don't have an opinion of the pros/cons of upgrading to the Lux system but I do have that in my '02 Denali. I currently am running a hybrid system; I upgraded the head unit to a dd Sony XAV602BT which really woke up the stock Bose speakers and amp, then all I needed was more bass so I added an MTX Thunderform enclosure in the rear stock location with a JL 10" sub and ran that off a Soundstream nano amp using the sub out on the HU. The imaging from the Bose system is amazing, it's like a surround system. This might be more than the op wants to do but in my opinion, the Bose Lux system is pretty damn good with a decent HU. And I also have never heard a "premium" stock system that I liked until this one, however it needs a little help I believe. New HU and more bass and you have a system that sounds like it cost thousands.
