The VLX is in - now, my stereo questions...

For convenience I ordered my VLX with the stock JBL head unit and four Infinity speakers. I'd like to add amps, subwoofer(s), and tower speakers. I'm looking to get set up right without going TOO insane, but I don't want to be rebuilding the system in a year.

Here's what I'm thinking:

Amps: 2 Phoenix Gold 600.4's (factory refurb)

Sub(s): 1 or 2 Elemental Design e12kd4 12" subs

Tower Speakers: Skylon Deafcon III or IV

I can get my best deal on the Skylons, and I understand they are really LOUD.

I'm thinking of running one 12" sub in the boat with the IV's or two 12's with the III's. The idea would be to run the subs from one amp and the 6 1/2's off the other. I will use the fader to adjust the relative volume of the tower vs. the interior speakers.

I am told the IV setup is VERY loud, but the III setup seems more "balanced" with 4 - 6 1/2's in the boat and on the tower and two subs in the boat. The overall price ends up about the same.

Anybody have any thoughts?