I'm trying to justify in my mind purchasing a sweet, fully loaded M20E.  I know there's a point of diminishing returns when upgrading the avionics on an older airplane like this, but I was curious what others thought the upper end of the price range a knowledgable buyer would stretch to.  I can post a picture of the panel if it would help.  And the airframe has pretty much all of the mods available (201 cowling, windshield, spinner, etc.).