I had the PS1000 for quite a while and just couldn't get it to not sound bloated in the bass and siren-like in the upper mids.
But now I have Grado GS1000i phones and I like them a lot.
(I actually had the original GS1000s that I liked a lot and traded up to the PS1000s and was surprised how much I didn't like the PSs.)
There is a touch of high end accentuation in the GSs but it is somehow pleasant and sweet and exciting, like fresh air. It's a tube-like treble: all there and soaring but not piercing.
The bass is just a bit thumpy and opaque, but just a little. I love how the GSs carve out each image precisely, but not too analytically.
The mids and vocals are not quite as detailed as, say, HD800s or as smooth as silk as my AT W3000anvs or HE500s, but they have a lot of life and air.
In short, the GSs are refreshing and airy w/o being abrasive almost all the time, and can give me chills.
Piano is great with the GSs, where I feel each key come to life and fade with great harmonics; it's a very real piano somehow, maybe the best to my recollection.
The GSs do best with CDs that do not suffer from too much digititus, as they will not smooth out any digital harshness, and really benefit from Hi-Rez recordings more than other phones.
So I think I like my GS1000s overall more than my HD800s, and they are definitely go-to phones for me.