Looks awesome. Can't wait for it to be finished and get the fish in. I like your water storage solution, great idea for such a small space. I'm planning on doing my own fish room in a few months, I hope it turns out as well as yours did. One thing to be careful with is the heaters in your water storage totes. I have seen heaters melt through plastic before, you may want to put a small piece of glass or acrylic in there for them to sit on so they aren't touching the totes.
Where did you find that insulation? I was planning on using rigid styrofoam on mine, maybe this stuff would be better.