You say you are sick of red meats and are going to eat tuna and chicken...... why haven't you been doing that all along? Have you actually read the book?
Dr Atkin's is not a red meat only diet. He lists all meats and seafoods on his induction lists. Chicken, pork, beef, lamb, veal, shellfish, fish etc.
Eating low carb bars is not recommended. After a year on this board I have seen many people stall because of the hidden carbs and their affects on people's bodies. (use the search function on this board on "low carb bars" and read up on the problems they cause others)
Maybe you should reread the book again. It sounds like you may have missed some very valuable points.
For instance You say you will control carbs but which carbs? There are actually good carbs and bad ones. The bad ones have a high glycemic index and do reck havoc on your blood chemistry.
I know a lot of people start Atkin's without reading his book because their friend "told" them exactly how to do it. My mother in law was one of those.....my father in law told her what the book said. After a few months she gave it up because she was sick of bacon, hamburger patties and cheese. ?!?!?!??!? That was all they were eating! Somehow he missed the fact that you could eat other stuff. Or maybe he just wanted to simplify it down. Either way it turned her off the diet.
This isn't really a diet, but a way of maintaining your wieght for the rest of your life. One in which you can enjoy eating rich foods that would normally be denied on some other diet.
Good luck