I like to use ultratherm heat pads. I find that they heat more evenly than zoomed and I once had a zoomed uth that would continue to heat after power was cut off (on/off type thermostat) and would get about 9 degrees above the temp it was supposed to be.
For a thermostat, the best one that most agree on is a herpstat. I use a herpstat 4 to control 4 seperate uths set at different temps and love it. They are easy to use and reliable. But.....they aren't cheap. If you have a split tank and are controlling 1 UTH (placed under the center of the divider so that each section has a warm spot near the center where the divider is), you could use a thermostat with 1 probe (like a herpstat 1.) If you get two tanks, with different UTHs, you will either need 2 thermostats with 1 probe / channel each or a thermostat that will control 2 UTHs (like the herpstat 2). The best "on / off" type thermostat that most use is the hydrofarm. I am currently using two of them and have had no problems.
I would suggest that you look into a pvc cage.. I don't own one myself, but I know that many here swear by their ability to hold humidity / heat and secure your snake.. Plus they make a great looking display. AP is one of the popular manufacturers and they offer units that you can put a removable divider into as well. I think many people use the T8 or the T10 with BPs. Please note that you have to assemble these cages and they sell heat tape to go with them (which you would hook into a thermostat and control like a UTH). It may end up being cheaper for you to use one of these with a divider than buying and fixing up two glass tanks... Plus it'll be easier to clean.
Good luck with your BPs!