K3?.. I'm thinking small like the k1, all band CW + SSB, 5 watts. Surface Mount Components (I would be just as scared as anyone but we have to learn sometime). K4?.. I'm thinking something similar to the new Ten Tec Jupiter. -OR- They could go the other way and make some huge retro boat anchor looking rig that has a 1.5kW PA and lots of vacuum tubes! I think that would be fun too. -Larry AE6CP