Having a wing mounted on the outboard also changes the balance of the boat. I have a Stingray on mine. Keeps the bow down, and it planes at 12 mph.
Lots of options, you just need to decide which one is right for you. No matter what your setup is, it is best to keep the people back as far as possible.
My tank was originally mounted with these, although just screwed into the floor they have held up to abuse. The dissimilar metals react a little but not bad. Put some anti-sieze on them upon assembly. Then I used a cheesy ratcheting strap set from China that I figured I would throw away, but with some WD-40 they keep living with only surface rust. I just cut the tie down the length we needed.
I also have four of them mounted on the second board that my tag lines attach to so when returning from diving we clip our gear off to them before reboarding. I put a D-ring on my partners 24lb weight belt so she doesn't have to lift it into the boat, but instead she can clip it off and let if drop. So far they are all solid with no pull outs. They could always be thru bolted if protected on the bottom with nothing in the way.
The battery should definetely not be at the back of the boat. Taking water over the stern leaves the battery box getting wet (Seems to happen often to me *shrugs*). I moved mine forward just for this reason alone. It is also going to get put into a sealed tower here within a couple of weeks.
Kelson, there are many times when just out cruising I wish I had seats and a steering wheel like your boat has. Way more comfortable than sitting on the tube and twisting the throttle for over an hour. We wind up taking turns driving and lots of breaks. For diving out of though floor space is at a premium...there isn't any LOL