just something to consider in terms of tank dimensions...a 32" tall tank will be pretty much impossible to service (you'll never reach the bottom without a mask and snorkel). i'm just shy of 6' tall, and one of my systems is a 50 gal pentagon that is about 20" high, and i with the canopy on, i can't reach the bottom unless i get on a short kitchen step ladder, and even then, i can't see what i'm doing because my head is over the tank. the canopy adds about 4"-5" to the tank depth, so figure about a two foot tall tank. i pretty much dread doing anything in that tank.
conversely, our 100 gal is also 20" tall, but there's no canopy, so i can reach the bottom fine.
just thought you might want to ponder this before you get too far along with your plans...
as for all this "what do i need?", etc. it would be helpful to know what you plan on keeping in the tank, or at least what kind of tank it will be. the more research and forethought you give this will save you time, trouble, sanity and money in the longrun.