Read some on IBD (inclusion body disease) first.

I dont want to sart anything nasty - I know LOTS of boa owners who have pythons without incident. I do think you ought to google it though before you diversify.

(EDIT - I REALLY REALLY would love to have an Argentine boa - but the wife and I just don't see eye to eye on it vs the rest of the collection. Of course things like this can be argued as being the equivalent of never letting your kids get their drivers licenses for fear they might get in a car wreck - and everyone here more than likely knows someone who's kept boas AND pythons for DECADES without incident. Mandatory group hug mmmkay)