Buy a big slatey gray first...see how you go with a fast moving colubrid, then look at elapids, you need to consider your experience, what "training" you have had, what you have worked with. My suggestion is learn to handle them first from someone, do a course, handle some wild ones, then get into keeping them, but establish some experience handling them first. I have great colletts, most of the time they are placid, I have great red bellies, most of the time they are great, I have some very placid tigers, and some nutjobs, every snake has its own personality you wont know it until you work it!