Need Help on Battery Type for Solar ?

My vote would be.

4-6 volt golf cart batteries wired to make 2-12 volt batteries.

Much higher capacity than 4-group 24 lead plate deep cycle batteries

The 300 watt kit isn't enough for 4 - 6 volt GC batteries. It is perfect for two GC batteries. If you plan on the 4-6 volt GC's you will need at least 400 watt and a MPPT controller and even that will be marginal for longest battery life.
The inverter only has an efficiency of 83 to 85 %. If you have to have a TV look for something in 12 volt with LED screen.

As a starting point 100 watts of solar per 100 AH of battery is a very minimum.

Your going with solar, so I have to assume that means you like to boondock? Gold cart batteries is the only way to go. At least for a reasonable price.

Dave,

Before the depression I made a living working on other people's boats.
I can tell you two things for a fact:
1 - Paralleling lead/acid batteries is not the best idea.
2 - Real 12V deep cycle batteries are hard to find and expensive.

All golf cart batteries are real deep cycle. That is the only way that they are made.

It looks like you have most of it figured out. No matter what you do with batteries in parallel, when the mode suits you, break up the bank and charge each set to full density. If you don't, one part of the bank will always be at less than full.

Matt

It would be for the water pump, lights, inverter for tv, charging phones and cpu. What more do you need?

It depends on how you will be using the power output of the batteries and personal preference. Which batteries you use are unimportant in relation to the solar panels.