I have a male dumeril boa. Bought him about 5 months ago, and then he was 1 yr old. He was around 200-300 grams then. Now he is almost 1000g and he is an awesome snake!! He is a very good eater, very docile and loves to be in the open. We handle him often and he is soo calm when out of his enclosure, never acts skittish or frightened. Never struck at myself or my wife. Even she can get him out of his house with no problem! Id say go with a dumeril, you will love it He will get alot bigger, which i cant wait for, hes already growing at a nice pace. Also hes eating med rats,keep them on rats. If you want to know more, jut ask.
For the cons.. well there isnt any!