The thing about rainbow boas is they are VERY sensitive to temps (they can't be too warm!) I believe over 82 degrees can kill them. They also need really high humidity.

Bloods are awesome.. easily my favorite snakes. Snappy bratty babies, though!

I much prefer the look of ackies to blue tongues, though both are cool. Ackies eat a lot! Not so cheap to feed, though if you raise your own feeder roaches (I recommend lobster roaches) it's not too bad.

Other snake suggestions.. pretty much any corn, milk, king or other colubrids. Western hognoses are cool.. savu python.. sumatran short tail python (black blood), jungle carpet python.. hogg island boa, sand boa (kenyan or roughscaled)