I have the factory stock Kenwood setup in my 06 LSV with the 6 cabin speakers, headunit, and the remote at driver cockpit. I want to setup on the right upgrade path as I can't go stereo crazy in one shot, will be iterative. My first requirement is to get some tower speakers so I can hear the music when surfing and wakeboarding.
Thinking my path should be (but please provide guidance if you think I am on the wrong path):
1. Tower speakers, looking at just 2 (their selection would probably drive the amp)
2. Amp for tower speakers

2nd round:
3. Dual battery setup (I put this at 3 instead of 1 because I don't normally anchor up and sit for hours at a time, I'm normally motor running)

3rd round:
4. Amp for cabin speakers/sub (assuming the tower speaker amp isn't big enough to drive some cabin ones also)
5. Subwoofer

4th round
6. New headunit
7. New cabin speakers


What do you think? If you have recommendations for any of the rounds, would be helpful, but round 1 is the only one near term.

Thanks