The K2 is unique! I built mine eleven years ago. It's still very much up to date. Of course I operate with a couple of Drake twins sometimes! I added the modules as they became available. I don't chase DX, or work contests (except field day) so I don't find any need for the K3. Now the KX3 is another story. It might be my intro into the next generation rig. Kurt, W7QHD