I have a few glass tank type systems...
Protank II (reliable, easy to set up, decent flavor)
Protank (same as above, but not as nice)
Fogger (hard to set up, but great performance)
AGT (for my Chi You)
Chobra (terrible)
and this:
UD AGR+ without the bottom locking cap part, on top of a Chemisis. I'm not generally a fan of carto-tanks, but this works well, looks fantastic, and with the airhole controls on the mod closed you can refill from the refill without any leaking.