I have the Brando aluminium case, which is very nice.
But my favourite is still the Nokia slide-on cover,
in combination with a Casio QV-100 foam slip case.
This slip case, made for an ancient digicam, fits the 770 perfectly.

From a practical point of view, the Nokia slide-on cover is the winner,
followed by the Brando alu case IMHO.

In both cases, you can use the 770 w/o having s.t. other laying around.
I haven't tried a leather case so far, as they were all heavier and thicker
than the Brando case, and plain ugly:-)


HTH

Raymond