I would think that most if not all of the 230 Wakes come with the infinity tower speaker system with public address (P/A system).
I was told this would be an extra 2 grand at the dealer. I considered buying the 230 Challenger with the tower and then adding the stereo. I justj went ahead and bought the 230 wake instead.
you can find the speakers for about $600 if you have the balls to go that route but the amplifier and and P/A mic will be separate. Infinity makes an amplifier that is specifically designed to coordinate with this speaker set-up. When you use the P/A the music turns off. There are also volume controls on the P/A mic that allow you to control the music level and P/A volume. Check my profile albums for pictures that I just posted.
Side note: The infinity Tower speakers are plenty loud and cost a fraction of the Wet Sounds. If you don't know about Wet Sounds I'll just tell you they're the loudest / best tower speakers that money can buy at the moment.