What about looking into which of Canons compacts can run CDHK?
Something like an IXUS 1100D or Powershot SX230is have the barebones of what you need, just not RAW.
I think you are going to have to accept that a big zoom and a larger sensor means a larger camera. If you want compact and superzoom then concessions have to be made. I think the Panny you mentioned makes a better fist of this than most.
In a way its a shame there aren't any equivalents to the Minolta Diamge A2 or Powershot Pro1 any more, decent handling, decent optics, pretty nasty sensor right enough, but the current crop of HS sensors could make up for the venerable bridge cameras short comings...
But then, cheap rebels killed this segment off! T3i and 40mm?