What type of fishing do you do? River, small to medium lakes, large lakes? I would go with a 36 volt, but check to see if there is space for a 3rd deep cycle first! If you do go with a 36 volt system, you will also need to up grade your onboard charger.
Agree with the above anglers. I have an 1875 Pro V with a 200 Vrod, 9.9 Pro Kicker and an 80# Minnkota. The only other comment I would make is that you need to find a place for the 3rd TM battery. I have 2 group 31 AMG’s up front below the rod locker – the other space below is taken up by my 3 bank charger. You might want to give it a look before you make the purchase.
bestfishes-jim