A lot of it is personal preference. We use HerpStats. User friendly menu, night drops, alarms, security code lockout, etc... for $139.

Like mentioned- they are on sale right now. I recommend Mark from A+ Serpents. We have purchased 5-6 HerpStats from him. Great service and he is an authorized distributor that will honor the current sale prices. We only use HerpStat 1's and HerpStat 2's.

http://www.aplusserpents.com/supplies/herstat.html