I am repowering and re-rigging my Sea-Pro 190CC. It weighs 1750# dry. I want to upgrade to a GPS trolling motor. I am currently rigged 24volt with two new interstate batteries located in my forward compartment. Going to 36 volt will probably require me buying 3 new smaller gel type batteries (3 larger batteries will not fit). My question is... will 36 volts be a big enough improvement to justify the extra expense (around $600? I have never run my 24 volt system dead, but with adding the GPS anchor, I am concerned. Thanks in advance for any advice.