I favor tubs. Just know that the room you keep it in needs to be warmer to keep the appropriate ambient temps up. A heat lamp to do that won't work with a tub.

Setup for one snake:

~ IMO a 28-34 qt tub for a 440 gram bp (size is personal preference)
~ UTH regulated with a thermostat or flexwatt regulated with a thermostat
~ binder clips/luggage straps to keep lid on
~ two hides, water bowl, foliage if wanted (fake plants or crumpled up newspaper)
~ digital thermometer for temp and humidity levels: you can do one with a probe for the hotspot OR what I do is one for ambient temps and check the hotspot with a temp gun