I have read the following comments about the F100: "When the shutter is tripped, the camera does make a more highly pitched sound than the F5." "Release is real quiet and smooth; quite different from F90X (and other brands)." "It is very silent in operation." My question is, is the F100 quieter than the F90X? I don't have a F100 at hand and the noise is about the only item which still keeps me from upgrading from my F90X (besides the missing money). Thanks, Ilkka