If you're talking about an acoustic break, vs. full band with distorted guitars n stuff, then just turn down the acoustic guitars?
Or just automate (either automate the guitars down, or make sure that when the band comes back in, EVERYTHING is edited to come in at the same spot. That helps an unbelievable amount. Make the kick come in a tiny bit before and cut the guitars/bass to come in just after it. Maybe even automate the kick's volume up a touch for that one hit too).
Anyway, I prefer no dynamics to too much dynamics. Listening to PT's new album on the bus.. the first song has a loud bit and then 30 seconds of stuff that, on a bus, you can't hear. So you turn it up and then when the loud stuff comes in its literally like 5x louder than the previous bit. Just pisses me off, you can either blow your ears out or not hear half the song.