njstone, An Avallo is a quality humi. Expensive, but very nice.
My Montegue leaks like a sieve. It was impossible to use beads and fans and get the RH to stabilize, so I had to give up on it. You would definitely want to get an active system for a Montegue IMO.
A word of caution to anyone that might want to buy one. When you get it, put a bright flashlight in it, with all the lights off in the room, so you can see if it leaks.
By the time you get it seasoned, loaded, and have a hard time getting the RH to stabilize, its too late to get CBid to help you with any problems.