amp configuration plus bi-amp vs bridge
 

Looking for some guidance for my boat system, which currently sounds fantastic but I have another amplifier that I think will elevate the system even further.
System consists of
1 pr JL Marine 7" Components (fronts)
1 pr JL marine 6.5" co-axials (rears)
all running off an Audison SRX 4

subs are 3 x JL 8" W3 running off a Hertz HDP-1

System is clean and loud. SQ is very good considering marine grade speakers.
I have a leftover Soundstream Rubicon 702.

I would like to incorporate it into the system in such a way to not only increase the volume but also be as good or better in SQ.
My inital thoughts were to run the 702 on the front speakers, and bridge the SRX4 for the rears. Simple.
However I started thinking about bi-amping with the SRX4 instead on the rears..then started thinking that perhaps bi-amping the srx 4 on the fronts may be better.

Given the available hardware, what should yield me the best results?
to recap:
1. Soundstream 702 on fronts, Bridged SRX4 on rears
2. Soundstream 702 on fronts, bi-amp srx4 on rears
3. Biamped SRX4 on fronts, 702 on rears
4. Bridged srx4 on fronts, 702 on rears

Thanks for your help

Revisiting this topic, as I bought a different boat and pulled most of the gear out of the last boat.

This time:
3 x JL 10W3 subs off the Hertz HDP-1

JL Marine 7" Component Fronts
Jl Marine 7" Coaxial fronts.

I still have the Audison SRX 4 and the Soundstream Rubicon 702.

I had done some experimenting with the audison vs 702 on the last boat.
702 running all the coax/component speakers at 2ohm stereo would get hot and go into thermal. Was loud.. didn't sound quite as good, but louder!

I see this post was from 2013. I recall at some point I had hooked up the 702 on the front components, and bridged the SRX4 on the rear. I can't recall, but one of them would go into thermal. Yes it was louder. SQ, if I recall was similar.

I believe that in that last boat, where the 6.5" rear coax's were mounted, low and close to the fibreglass floor, that they reflected very well around the boat and actually made up for more of the sound output then the 7" components in the front.

In the new boat the rear coax's are kind of tucked into the sides in a cupholder / speaker cutout.

Thoughts?