Good choice man, Arg. B/W are awesome, I currently have two and will probably get a few more. I also have a red, although she is awesome, she is still only a baby so I haven't experienced a whole lot of reds yet. Also, good choice on picking one up from Bobby, he has a lot of experience and is very knowledgeable. I can tell you that you will not be disappointed with an Arg. B/W, or doing business with Bobby. Good luck man, and welcome to the tegu family.
Also, feel free to ask as many questions as you feel you need to, no one can ever know too much and even if you think your question is stupid, it's better to be sure than get it wrong and regret it later.