Welcome to the forum. Innovative Marine Lagoon 50 is a great tank, I like mine. The SR60 version is 6“ longer and has a wider rear chamber so more equipment options are available for that one. There are many good choices but you can’t go wrong with IM. If you’re idea of an AIO includes tanks with a sump that come with everything including the plumbing then Redsea has a couple that you should look at and so does Waterbox.