24v is all you'll need. You've seen my rig, 80lb Terrova on the front will last me days before recharging on good batteries. I've got a HB 958 up front on the bow attached to the US2 in the Terrova. And really for Nip unless you're fishing lakers or pike, I don't even turn the sonar on, lol. My console unit has all the cool stuff (SI, DI, etc). The only other thing I could see that would be useful upfront would be a SI tranducer. That can easily be attached to the Minn Kota if you wanted.