Sound is such a subjective thing. I have the HK and am severely disappointed in it. Especially the sub bass. Adding polyfill to the stock sub enclosure didn’t do any good. No noticeable change to my ears anyway. I know that one of the engineers that works on the HK system is a member of this site so I say this knowing full well that there are many factors involved in the decisions made for this HK system, but I don’t think it’s worth the “price” for it. It was other options that drove my decision to purchase the truck I did and it happened to have the HK system. Adding an aftermarket sub significantly improves the sub bass performance and allows for a better balance. However, eventually I’d like to replace all of the speakers and add a DSP for more control. Like any other sound discussion though, if it sounds good to you, don’t change a thing.