CuzzA, yeah I'd love a standard size (48") and the increased gallons and specie potential. I'll double check if it's possible structurally but know it would be really cramped in the space. But a 36" may be undersized for the space!
All you guys who responded have 24" tall tanks. I have many topics to research and one of them will be how, and how often, one needs to access the very bottom of the tank. A 30" tall sounds really inconvenient but I'm pretty sure there are implements to reach the bottom.
I'm neck deep (literally) in my spare time on a major outdoor koi pond expansion (5' deep and will be 3,500 to 6,000 gallons) with very advanced life support. So I've yet to have the time to research salt aquariums. My goal for now is just to order a tank so I can schedule the cabinet build around it! You guys have been great in helping me out!!!