When I first started keeping BP's, I kept them in display cages. They look nice, but you NEVER see the BP. A happy BP is a hiding BP.
I am in the process of switching over to a rack, but I currently have 1 of my BP's in a standalone tub. I keep my house at approx. 72-74 degrees year round, so the cool side of the tub was too cool. I actually have to use a heat pad on each side of the tub, each with its own thermostat until I get him transferred to the rack.
My main reasons for switching over to a rack are that as my collection grows, the rack takes up less space than individual display cages and more importantly...tubs are infinitely easier to clean and disinfect than a cage or tank.