So I am in the process of setting up a 2x2x4 enclosure. Still in the process of setting it up and I have a Monsoon 2 that I will probably start out with but I know (now) that I will want to switch over to a mist king prior to getting a chameleon. While there isn't a lot of difference in price between the starter version 4.0 and 5.0 I am occasionally running across good deals on the 4.0 version. Anyone have both or used both and have any opinions on the differences? It will be used on one chameleon enclosure only so I won't be looking to expand beyond 2 mist heads. Just wondering if there is a big difference that makes the 5.0 worth the extra $20-30? Thanks!