newbie here.

Welcome to 3Reef>>>>>

 

Welcome!

I understand you want a big reef, but if this is your first time, i would suggest getting something with everything already built in it. For example, you can have a great look reef in a 29 biocube, or something at your Local Fish Store that already has everything biult in them. people also make mods to their biocube and aquapods to put in refugiums, and other stuff they lack. And you can still have your corals, colorful fish, and etc. later on, once knowing all the basics of reef keeping, you can get that 75, and not have as many problems than just jumping in.
just my 2 cents

Good Luck! Let us know what you decide