Funny you mention your k22. Once and while I consider letting go my 2005 512ce-L10 (all hog)...then I play her, shake my head and say to myself "what are you thinking!". I hope to never succumb to the urge.
But I do regret selling my 2010 414ce-ltd (sitka/walnut with maple back wedge). That was a sweet guitar...oh, and my 2009 710ce-ltd (sitka over maddy rw)...and my...oh well, the lesson is, never let them go!