By your fish list you should be alright with any of those listed tanks. I always try to get the longest tank possible as it lets the fish swim around further, so for viewing looks good. In the end it is going to come down to space and what you like for viewing.
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RSM 250. Clownfish, Fox face, Blue tang, Yellow tang, Kole tang, Clown tang, Coral beauty angel, French Angel, splendid dottyback. CUC, softies, lps, sps.
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