Tvad,
go with your ears, as you are.
Radrog,
In your other thread you said you were loading it at 47k not 47. The internal
impedance of the Goldfinger is 32 ohms which is relatively high compared to
many MCs. This is how the Goldfinger achieves the relatively high output of
.9mV. This would typically require something around 300 to 1K, but again,
that's a theoretical guide.
Just as an example, I was advised to run the extremely low impedance
Transfiguration Orpheus wide open at 47k as it does not require to be
damped down even though its internal impedance is 2.5 ohms. George
Cardas advises to run the Cardas Heart, which has an internal impedance
more like your Goldfinger, at 47k or even higher.
Once your 'finger breaks in you might find that it can stand a higher load
resistance without sounding rough or bright. In the mean time I would think
that something in the area of 300 to 1k would be a likely range.