I would love to have the WS-420, but for 3 times the cost I'm not sure I can justify it. My HU is wired so I can fade the tower and cockpit speakers, so that's not an issue.
The Bozooka is a fairly simple PA system, but I would like to hear from someone who has used one for the pros and cons.
http://www.mobilcaraudio.com/catalog/item/1017521/4947093.htm