Yes, they definitely do.They definitely scale with better gear.
The only Grado I preferred with a SS amp was my PS1000.
This is exactly why I didn't buy another Grado.Thanks for this reminder!
I tried the G cush on my fresh GH1 and much preferred the L, and continued to break them in, as the G sounded thin, and low in level actually.
Now at least 100 hours in, they fill the G as well as my GS2Ke, and with truly remarkable detailI'd been enjoying some of my lute recordings (Lindberg, Hofstotter, Barto) with GS2Ke, and GH1/G has taken up the duty.
I will be listening to either my GH1 or 2 tonight since it's been a few weeks now and I'm missing them.