1. The Forsell Air Reference is very good transport, spacious, nice warm sounding - but perhaps a tube DAC needs more detail and slam. Do nor get the first versions - the mk3 was the one to own.
2. CEC TLX-1 - great treble, delicate and airy. Deep, articulate bass. Could sound lean in some DACs.
3. Metronome Kalista/Calypso - an exceptional transport. Unique scale and dynamics, makes digital flow. Very natural sounding.
Unfortunately I never listened to a GG, please take it as a general comment.
I have just got the mk3. The seller is looking for the remote control because without that, it's impossible to play anything and according to him, the laser lens pickup also need replacement. The hydraulic arm is not working properly. Cross my fingers, everything will be OK one day.