What company would you like to be sponsered by. Pacman has nike. Hasegawa has asics. Many boxers are everlast fighters. Adidas sponsers alot of fighters in europe. So what sports company would you like to be sponsered by idealy, they would give you free boxing shoes clothes and if they make it custom boxing shorts.
Nike is too obvious, and their boxing gear isn't very good anyway. They don't seem to put a whole lot of R&D into it, and some of their choices are just bizarre. Why on earth does Michael Jordan have a boxing shoe? He doesn't even box. Their Machomai shoes are actually great for boxing, but they look absolutely ridiculous in training (I've been laughed out of a gym before for wearing the red ones).
I would go with Winning. Why not be a trendsetter? And we all know that Winning makes the best boxing gear out there. Free Winning gear, possibly a signature item or two, unique brand name that only people in-the-know would recognize, etc. Why not?