Most of these factory systems with big names on them don't sound nearly as good as even low-mid end aftermarket. They just pay for names so you'll go "Oooh!"
Bose has always been sub par anyway, and H&K sold out long ago. H&K stopped being good when they bought Infinity (whom they ruined) and started selling all of their junk in big box stores.
Even the B&O audio in my buddy's Audi S5 is only "ok." The cones aren't paper, but they're on par with the cheaper aftermarket poly cones that come on stuff you'd get at Best Buy. Their high high end is still really good, but at that point you might as well start looking at B&O or B&W.
Also, just because the cones are made from paper doesn't mean that the speakers are junk. I've seen some ultra expensive drivers that use fibrous cones. A lot of people think that it sounds warmer than polypropylene (plastic), carbon ceramic, carbon fiber, and sometimes even silk (depending).
