Hi- I use the Rainmaker Jr. on my 6 panther cages, and I love it, so do my panthers! Each company has a diffrent pump and each pump can handle so many misting ports. Also each pump has a diffrent run time, some can only run for a few min. at a time and some can run 24hrs 7 days a week. I dont think you need anything fancy for two cages. Click on the link below for more info on the Rainmaker Jr. :are all systems pretty much the same or is there one that stands out as being better? i'll only being using it for one chameleon(nosey be' panther) and MAYBE(and a huge maybe at that!)adding a female next year.