Stereo in my boat is weak. Starting to put it together slowly. So far this is what I got;

Rockford M210S4 Marine 10" subwoofer 250 watt rms
6 kicker tower speakers 100 watts each rms
4 cabin speakers 60 watts each rms

My boat currently has 2 batteries with a switch. I play to use one to crank the boat and one to run the stereo. Will this be enough battery power essentially for 10 speakers and a sub?

Now, I am in the market for a couple of amps. What do you guys suggest without breaking the bank.
I have been looking at getting 2 Rockford Fostgate M600-4D 600 watts rms each.

Thoughts? Tips?