I can remember a thread a while back about someone nearly burning their house down by melting a pennine with a heat lamp. The viv was pretty wrecked anyhow. For this reason I would never suggest using one with a heat lamp so I wouldn't have that if I were you. You want a wooden vivarium with the minimum dimensions of 4x2x2. Remember, the bigger the better.
Take a look here
to see everything that is suggested for a BD setup.