My current setup(s).
I am really enjoying both the Lemo and the Lemo drop. They are "originals", although they (along with a few other rebuildables) take a cue from the Kayfun system.
I can't say they are going to replace all my rebuildables, but for the price (less than $35 shipped, each) but the adjustable airflow is definitely a step in the right direction.
Flavor on the Drop is a little warmer and... richer(?) than the Lemo, but its chimney is just a stub compared to the full-size version, so that makes sense. And I will say that it is at least on par with a Kayfun.