Well I have some vintage Technics and a brand new mk7.
Can I say mi honest opinion?
... I don't think the GR sounds better than the mk7
I have my mk7 with AT vm540ml cartridge and sounds fabulous, many LPs sounds really better than my digital system (raspberry pi / Schiit modius / ripped CDs with EAC)
I also have AT mc ptg33II and that sounds fabulous too.
The mk7 sells for 1k USD ... best bang for the bucks. The GR have some better look and feel at some aspects, but I think nothing that really improves the sound.
That's my very honest opinion.