If I was in your boat, I'd probably go with the beads if you're looking to replace your existing humidifiers. From reading past posts, the guy who owns heartfelt industries provides excellent customer service and has a high satisfaction rate on his products.

For more information on beads, and heartfelt (viper is the owner) check out this thread:

http://www.cigarsmokers.com/t98-humidity-beads.html

Heartfelt's website: http://www.heartfeltindustries.com/H...ont%20Page.htm

Good Luck!