rhythmdevils, you've helped to clarify some things for me that I'd noticed in some reviews, but hadn't really consciously connected. Thanks for making the effort to help me to narrow in on some of their characteristics that I feel haven't been articulated very well in the reviews.
What you said about how everything sounds a little further back in the mix makes sense. I could see how this could bother some people who are hooked on the very forward presentation, but for me, it sounds like it might be perfect. I appreciated the RS-1 for having a little more soundstage than some of the other production Grados.
Then again, I felt like the HF-1 had a little more soundstage than what I was expecting, but that it might have been the result of the mids being a little recessed in comparison to what I was used to from Grado. I'm really hoping that the HF-2's mids aren't recessed, or if they are, that they're in balance with the rest of the sound, which seems to be what you're observing.
I'll have to give some more thought to what it is about the HF-1's mids that I'm thinking of, as I'm not sure whether 'recessed' is the right description.
The comments you made about how they're less sparkley and have less weight to the instruments, while having a clean/crisp but silky sound, seems to be their hallmark. I've heard a couple of others make a similar observation. It's a very intriguing description.
I kinda wish they had the weight that I've heard associated with the PS-1's, but without having personally heard either can, it's too abstract for me to really comment on.