Part of it will depend on how you need to use it. If you will need a mister system to replace hand spraying every day or while you are away from home, an timer controlled system like the Ecologic Technologies Rainmaker is really great. It runs off a 5 gal. reservoir and includes everything you would need to set the system up (pump, pressure hose, nozzles, fittings, reservoir, etc). You can expand the system to spray multiple cages too. Some people base their misters on those perforated hose misting systems used to cool off patios in summer. If you are there to hand spray in mornings and evenings regularly and just want the mister to add humidity between sprayings, an ultrasonic room humidifier might be all you need. You can get them at larger pharmacies or home improvement stores for about $40 and run them with a plug in timer. I found drippers to be a hassle so stopped using them and some of my chams never used them reliably. I hand spray and use a mister system to "fill in" the gaps.