you could go with a complete cube and end up with about a 59.8g tank 24x24x24 your light would work. That is a 150w MH with 2-65W actinics yuor would be prity much max for light if you kept some of the sps and a few other things. It would be cool looking tank easy to make your self have glass cut, drilled and you put it together. 1/4" min 3/8" perferd for a tank this size unless tempered but that would cost more.

Bill