Bikertrash: Yeah, I really enjoy the PX4. The M&P fits my hand a little better and I've been training with it a lot more lately but hands down I still shoot the best with the PX4. I've also owned the PX4 the longest and put the most rounds through it so that is a factor. The rotating barrel is really nice especially since it doesn't have the lowest of bores. I'll never get rid of that gun.
Plus, you gotta love those 20 round extended magazines.