Second Tvad's suggestion. If I where pushed to select, I would go for the K&K. I've owned a Rhea and have heard the K&K along side my Alaap. The K&K is far and away more preferable to my ears. Your Coronet should be a great sounding unit given what I've heard from other Hagerman gear. It would probably benefit from a larger, more over-built power supply. That is also my impression of the K&K, but to a lesser degree, and I haven't heard all of Kevin's mods.