To update you chaps,
I ended up ordering the Innovative Marine Nuvo Fusion 2 50 gallon AIO. I was waffling between that and the Waterbox 50.3 (and even the Red Sea Reefer 250 for a bit), but the IM went on sale for a good price with the stand included and I jumped on it. I'll be creating a build thread on it soon.
My plan is to move most of the existing fish in my system over to the new system. My final stocking plan is:
2 Oscellaris Clowns
1 Royal Gramma
1 Firefish
1 six-line wrasse
1 Orchid Dottyback
1 Azure Damselfish
2 Kaudern's Cardinalfish
I also own a Two Barred Rabbitfish that I won't be able to keep in this system. I was okay with him in my 75 gallon for a bit, but even in that one I'd planned on re-homing him once he grew larger. My plan is to replace him with a Sailfin Blenny or Watchman Goby for algae cleanup.
I haven't decided on CUC or inverts yet. I have some Mexican Turbo and Nassarius Snails living in my 75 gallon, but I'm not sure if I plan on transferring them since honestly they don't seem very effective at actually cleaning up algae.
I'm planning on setting up my system for dosing so that besides ATO I'll never really have to do water changes, but that's a future plan once the tank is settled in. I ordered the UV from IM and media racks from inTank. I plan to user filter pads or floss rather than using socks. I haven't decided on a skimmer either, I've heard good things about the Eshopps and the K-1. The selection seems to be really limited for AIO tanks of this size that can also fit a skimmer rated for this much water.
My biggest concern with this type of tank was nutrient export. The algae scrubber in my 75 gallon worked great, but there's not really room for anything like that in this system, and the refugium compartments seem really small and lackluster. I might try to figure out some sort of algae reactor. My other option is to do Carbon dosing, but I don't know much about it and I don't really understand it all that well so I'm going to have to research that more.
My 75 gallon will be going down in the next few weeks and you'll probably see some equipment going up for sale on that. To give you guys first dibs I'll for sure be selling the Algae Scrubber, Klir DI-4 roller, and Simplicity DC Skimmer.