Yes, the R10 is second only to Qualia interm of speed. The missing link for the Qualia for me is slightly dried midrange and colder/brighter tonality.
Yes, I they are very very clean sounding headphone. Perhaps one of the clenest next to the R10, Qualia, and K1000 (not in particular order). I was very impressed with the way the HP2 sounded with the Melos Sha Gold Reference.