Getting back into the hobby, suggestions?

[Cichlids-r-beasts]

I have kept (For quite a long time) and had a pair of tetracanthus successfully breed in a 125, but they would not tolerate any other fish in the tank, neither, other cichlids, nor dithers.
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The 90 would probably work, and be best long term for smaller cichlid species like Amatitlania in a multiple cichlid community, or just a single medium size cichlid with no other fish.
few different Amatitlania/Cryptoheros species below, I've been able to keep in similar size tanks to a 90.
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Cryptoheros curer left, Amatitlania myrnae, middle, Honduran Red point right
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Above One of only 3 cichlid species from India, Etroplus canarensus

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Above, Amatitlania nanoluteus left, Herotilapia multispinossa right

There are tons of options

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Yeah if I’m going with the Cubans they’d be the only fish in there. It’s a tough choice, the average Cuban may not be as personable as the average Labiatus but there’s just something about watching a pair of cichlids raise their fry, it’s extraordinary.

Thanks for the input Duanes!