The glass is either half-filled or half-empty. It all depends on one's view point. I'm almost done with my car sound upgrade. Both cars have separates (tweeters, 1 way speakers, crossovers), rear 2 way coax speakers, amplifiers and subwoofers. Currently, the head units remain stock.
Now to top off the car sound upgrade project, a discreet sticker IDs the brand it's carrying. It's proudly shown at the rear windshield.
This should suffice for now. Future mods may include a new head unit and a digital sound processor.