I am thinking about the K2. The K3 is surface mounted components, and building the kit is just assembling PCBs. I'd rather solder a kit myself, with through-hole components. That way, it it "craps out," you can always fix it, assuming you can find the parts or you have them in stock.. For an emergency radio, being able to repair it without support from the manufacturer is important.. If you want to get back to CW, the K1 is great! It's only $300, and if you can solder and follow directions, there is no reason it won't work. Moreover, it's small and portable, draws only around 60mA on receive, and outputs up to 7W. The K2 is a bit pricy, but there is nothing else like it..
Gil.