I have the Lyman, it's great but it leaks from time to time. I think it has to do with pressure building when washing (lemishine and armorall wash and shine), since I don't get leaks when just rinsing or doing a quick grime wash with water.
I would stay away from the harbor freight tumbler. That was my first step and I will say that even if you get it for $40 that money would be better spent towards a Franklin or Lyman. This kits come with pins and the stuff you need to strain and separate as well. My harbor freight had tracking issues and the motor burned out in under a year. I wanted to see if I liked wet tumbling first.
That being said, I can guarantee you will like wet tumbling better and just put that money towards whichever one you choose