"The better the cart. the lower the loading."
I don't know where you heard that but it is definitely not true. Loading has to do with electrical resonance damping and cannot be systematically approached even on the basis of impedance matching. Some designers would even say the opposite in that if the cartridge needs to be electrically damped it isn't designed properly. Of course, that's one extreme opinion. Your new Goldfinger is a high output, high impedance design that will not do well with a low load impedance.
Jandrese9882,
What was "not right" about 1k? That or there abouts ought to work.