I'll second (third) the vote for the Little Blizzard. I'm currently wrapping up a production of White Christmas and I have two of them on 2nd
electric. We close the run tomorrow, but I'll try to shoot some video for reference as to how loud they actually are before
strike next week. I was initially worried about the noise, as well, and it is a
bit intimidating when you first fire them up. However, once they're flown you can't hear them running on
stage provided there's some sort of musical number going on. (In my case, there most definitely is - be it the Finale or the
encore plus crowd noise. YMMV.) There are also several adjustments that can be made via
DMX and/or physical switches that provide for variable output and noise. I have two fans running as well to "dry out"/disperse everything, and even they are hard to
pick up when hidden behind the borders. I'd even go so far as to say that the noise of the
HVAC running in the 800-seat space is more prominent than the dispersion fans or the snow machines themselves.