I've not read the whole thread and this has probably been pointed out a dozen times already, but: the notion that weight training --> more muscle mass --> slower reflexes and less raw speed is nothing more than a misconception that got repeated enough times to be considered as fact decades ago (see: "muscle bound" or "muscle binding") which despite being refuted by disciplined, scientifically-rigorous studies and a mountain of anecdotal evidence the size of K2 refuses to die the death it deserves.
If you make sure to mix in enough speed training and/or exercises that can enhance speed and power (isometrics and plyometrics, for example, which have increased in popularity) you should perform well.
P.S. no matter how you train, some dude out there is gonna be fast enough to make you look like you're asleep...and you might meet him in the ring at your next bout. Those are just the breaks, and must be dealt with strategy and experience.