INPUT WANTED for Shallow Lagoon Tank

Hey guys,

I want to build (or buy) a shallow freshwater tank with dimensions 48" x 24" x ~16". Originally I planned side overflow but now Im interested in relocating it to the center to do some more creative work...
http://www.youtube.com/user/Konolua

current unresolved issues:

Return Location:
Location of water return in conjunction to a centered internal overflow?

Filter:
Canister filter vs. Wet/Dry filter (prefer W/D)

Ive got a school of redtail labeos living with crabs in a normal boring tank. I would prefer a wide shallow tank, and am planning to construct something tall covering the centered overflow. Currently working on the stand while I price out the tank. What do you think? Any suggestions are appreciated.

I was researching and noticed glasscages will be in my area in about a week. I may order the glass from them, anyone have any experience with them?

Hey is there a problem with using 3/8" glass for a tank of that size, because I found a manuf thats willing to sell me some huge pieces for a few dollars..