I hear you. Are you not interested in putting in the time or are you no longer interested in retaining the OEM look while significantly upgrading the sound?
people like to add a lil flash to show they have a system but with some good carpet matching or a acoustically dead fabric that is the same color as your carpet wrapped around a grill attached with magnets, you could very well have a hidden speaker. Its all about how much planning you do and room you're willing to utilize.