WOW!
Thank you all for the replies. I've pretty much ruled out the Argentine as they are not any smaller, and I have also researched that what some here have said is true as far as their overall demeanor.

Seeing as how I will probably choose the Red Tail Or the Dumerils I would more than likely go with the one that is a bit more active in the tank. That said the one that is least likely to strike during handling is still a concern. Obviously things differ from snake to snake, but in general laid back but active and very tolerant of handling would be desired traits.

I'll look at care sheets to see which is the easiest for our situation.

Has anybody used a glass tank for any of the bigger snakes. 75 gal type? I'm not sure the design of our Critter Cage is decent for the bigger stronger snakes. The top clips seem fine for the BP but I still use a mini pad lock.

I'd think a Red T or Dums would easily break the screen and top.

Not even sure why I'm remotely excited. My wife said "it's not going to happen". My son and I have other ideas though : )