After using the HHKB Pro 2 for 4 days I am very happy with it and do not understand the fuss about 55g? 45g feels pretty solid for me. It doesn't feel mushy. Admittedly it is not as hard as Matias Quiet Pro nor Code MX Clears but it's not that soft either. It is a bit harder than the MX Blues though, so I thought the HHKB strikes a awfully good balance between Blues and Clears/Alps.
And no, you don't need to tell me about 55g because, I am done with keyboard, you hear me!!!