Surprised no one responded to this yet. Definitely go for the best mistking setup you can afford. Or build your own system by ordering individual parts. You can get a hygrotherm controller that will monitor humidity and turn your mister on when humidity falls below a preset level. A mister is just that, it increases humidity by spraying a fine mist. I saw some really trick, true rainfall systems in paludariums built but guys in eurooe, bjt they aren't coughing up the secret to building them very easily. You could always design a drip system to simulate rainfall. In fact, they are quite commonly used in rain chambers for breeding. I'm sure there is a thread or two in here on it. A couple strobe lights and a thunderstorm soundtrack and you got the rainforest at home......lol