Reply #1: Which cat is the alpha now?

[Samurai_Writer]

I would go with selections based on the alpha cat. If Lucy is alpha, then I would get a male. I'd probably go with a cat who is 5-8 years old. Still got plenty of play in them.

The big question, though, is do you really need another cat? If your two are getting along really well, I would be hesitant to add a third. It could change the entire dynamic of the kitty household. My limit, personally, has always been two cats, but everyone is different.