I am looking at buying a fish finder but not sure what would be best for me. I fish oxbows 90% of the time but would like to fish a few larger lakes on occasion. I usually vertical jig and will occasionally cast if they arent biting good. Trying to get an idea of what would be best for my situation just 2d or would di or si benefit me more as i have never used either of them. Any tips and suggestions are greatly appreciated!