As far as fish I just have some general idea, with a few specifics, fish I have now that I have promised will be living in the mega tank include 1) a Naso Tang 2) a Vlamingi Tang 3) a Purple Tang 4) Your basic Foxface ; all four of these are in the 4 to 7" range. I also have 5) a Golden Angel 6) a Coral Beauty Angel; I'd like to add several other centropyges, kinda the theory used when you throw a whole bunch of Malawi's in the tank all at once, but I'll give that some thought. I also have 7) a long nose butterfly that is getting really neurotic in a forty, needs some room and I may also throw 8 & 9) a pair of maroons in there with no anemone, but I need to find if they can adapt to that after aways having an anemone... Anyway, that is what I will start with. On my wish list of larger fish is a Magnificent\Metallic Foxface, a Hepatus Tang, an Achilles Tang, and an Azfur Angel. Most likely anything else I get will be in the 2 - 4" range, I'm thinking about large groups of a few things, like a dozen Fire Shrimp and/or 10 - 20 clown gobies, green yellow mix and/or a school of Anthias/Chromis/Yellow or Blue Assessors/Barred Gobies/a harem of Flasher Wrasses, but I've got lots of months to think this out. I need to set up a quarantine tank again, until I have that well established there will be no new fish, I'll focus on my corals I have at present when I get all the fish I have established, slow is good.....