Mayweather vs Pacquiao @ 147: Who wins?

I have Floyd winning by UD, Manny winning rounds 1-4. I envision an all out war from start to finish, in which Floyd goes down twice early, but rallies back like Marquez, but unlike Marquez, there is no controversy and Floyd wins by a good margin on points, due to more accurate countering, ring generalship, and his ability to adjust midway and stay one step ahead of his opponent strategically. Thoughts? I know this isn't a new topic by any means, but the old master thread is gone, and there is no where else to discuss it, and it's still an attractive fight, at least to me.