There are also other carpet pythons out there, between the Costal and the IJ size.
I have a 6 mo. old jungle as my first medium size snake, figuring that in the 6-8 ft range as an adult is all I feel safe to handle on my own. I chose a carpet because they aren't as heavy bodied like dumerils and some of the others, I have a bad back and don't want to be lifting 30+ lbs of snake. So far he's got quite a grip on him when he's hungry and trying to "kill" my hand, so I'm expecting him to be very strong as an adult.