Which hot comb is the best? (Any hair straightening tips are welcome!)?

Hi, I'm trying to find the best hot comb for natural 4a/4b thick type hair (hasn't been relaxed in two years). I currently own the Andis Ceramic Flat Iron and the MAXIglide, but I still end up with poofy hair even after four hours of combing and pressing. Although I use heat/humidity protection, my hair always poofs up while I press a new section. I'm looking to achieve bone-straight hair while avoiding the damaging effects of relaxers/perms in order to keep my hair natural as well as healthy. Of course, I'm still experimenting with different techniques and regimes to reach my goal of straight, non-poofing hair... but it doesn't hurt to ask someone for ideas. Thanks in advance! =)