Wasn't sure if this was the place to put this, but I love punching the heavy bag at my gym and have been looking to buy one. Only thing is, I know nothing about them. Is there any certain kind I should get? Brand? What its wrapped in (seen canvas, vinyl, etc.)? Any help is appreciated. Of course the cheaper the better, but money is out of the question. I don't wanna buy something thats gonna break in a few months.