What will work in a CB70?

So I'm getting back into keeping snakes after a couple years away. I just ordered a three rack CB-70 Iris Rack (41 qt), the herpstat, and all that good stuff. Its gonna be about a month until I get the rack/head to an expo, so I have a lot of time to think about what I want to get. I know for one tub I plan on getting a Ball Python Morph of some sort, but what else would work in this size rack (with BP temps)? Never had a good old boa constrictor before, but I was really liking the Hog Island boas (male). I've read inconsistent advice as to if they would do well in a CB-70. What do you guys think? And other suggestions to fill the tubs? I'd be open to any, just not that into any colubrids. Thanks!!