I have a Minn kota 38lb thrust trolling motor. I was wondering what is a good size battery for this motor. I know it has to be deep cycle but I am curious as to what size battery I need. I was thinking a size 27. Also should I get a gelled type. I will be using the motor/batt in a fish hunter 9ft raft and also a 10' fiberglass boat. Any ideas on a good brand or store with good prices??? I appreciate any info, Ryan