I have boards with Aristotle and Phoenix stems. The Phoenix stems are based on the Aristotles (Aristotle stems are increasingly hard to find). I find both more enjoyable than Kailh Jades/Navies, blues, green, really any other clicky.
I got the Phoenix stems from Gazzew directly, don't know if he's still selling to individuals. Since they're low batch, there is a premium you'll pay.