Well, can i offer a little advice?
I am just a little ahead of where you are in your purchase. Something to give serious thought to, by the time I am done, I will have as much in all the "others" as i will in the tank itself.
Initialy glasscages glass 100 was cheaper the TRUVU acrylic 100. However as i wanted drilled bottom, and saphire front, Truvvu ended up almost the same.
i will be calling truvu today to order a 72x18x18 for almost $600.00 delivered to my door. But i spent that on plumbing pumps heaters sump etc.
So i guess what i am trying to say is if you dont have everything else you need on hand allready, think about all the oher costs that will come with a tank that size.