I agree with chpthril on wiring the ACR on the oposite side of the switch.
I would also think about getting more seperation between your starter/house battery/electrical system and your stereo batteries/electrical system. By that I mean run a positive and negative straight off the stereo batteries to distribution blocks and wire everything related to the stereo (amps, ZLD, remotes,head unit, etc..) through those blocks. this will help prevent ground loops and noise in your stereo system.
one last comment and Im not sure about this but it looks as though you have your stereo batteries wired in parallel and you have each of the 2 batteries hooked up to seperate leads from the charger. since those batteries act as 1 bank, I think you should only have one lead from the charger.
nice diagram by the way