Here is the best pic of the engine compartment that I have right now. I can get a better one once I get back in town.

Red Box with the blue top optima. Perfect combo for your set up! If you use a regular battery then I would go with the chrome or polish with a black battery.

Can you clear the polished box

Best to anodize a polished piece. Powdercoat doesn't seem to adhere to polished very well. The clear anodize will leave the box with a duller finish though.

Blue

Polished with blue step plates. Or mix them up, if you have three or four batteries alternate colors and step plates. Ex. Blue with polished step plate, then polished with blue step plate and keep alternating. Buy the red tops, they have a three year warranty and are cheaper than the blue. You can also use the side posts so that no-one can see your cables, makes for a really clean look.

I had polished and they started to look skanky, so i replaced them with red, no maintainance, look great.

if you are worried about acid, get the optimas, they can take the constant toll of playing the system with the motors off, running the batteries down low and charging right back up, plus they are sealed and no acids!

Red

I had a single HP500EFI in my Sonic, and had my battery boxes PC'd Purple to match the rest of the accessories on the boat.

Go with the Red, to match the rest of the boat. It will keep the engine isolated by color/design, and still remain the focal piece. If you go with Blue, your eyes will naturally catch all things Blue, and take away from the engine.

I've attached a picture of my Sonic's engine compartment. Not the Optima battery, and not the same box, but just to illustrate my point.

In my AT, I went with billet Optima boxes by Livorsi from Fred. I pulled the two factory batteries and installed 4 Blue Top Optimas in the purple boxes. The only problem is they are COMPLETELY hidden under the backseat inside the gunwales, to make room for my sealed sub enclosure that drops in under the back seat.

Nothing fancy, Shiny A$$ed Black