I've been an SR225 guy for about four years now, and, from my reading about the RS-1 and RS-2, I do not think that I want to change my headphone in quite that direction. I want to hear the SR225 sound, but as good as it can be.
Enter Ken Ball and ALO:
Ken is such an artist, visually and sonically, that, when I saw that he chose the SR225 as a can to mod, I knew that he was the one to mod me a maximum SR225. Well, a few emails and option choices later, here are my (now a few weeks old) ALO Custom-modded SR225, with 18G Jena Labs Ultra Cryo wire from plug to fork and 22G Ultra Cryo wire from fork to cups in Bacote wood:
As lovely as they look (when I first saw them, I could not quite believe that they were really mine), their sound leaves their looks behind. They have the SR225 sound, but with quite a good deal more capacity to present sound along many dimensions. What is most interesting to me is that these Grados are PERFECT for jazz, instrumental, orchestral, classical piano and human voice - quite a bit more realistically life-like in timbre and spatial imaging than the Senn HD650 (with a Cardas replacement cable - Equinox cable on order). This is accomplished without losing its transporting sound for rock, trance, dream, shoegaze, goth, trip-hop and electronica of many genres. This customized SR225 is an amazing listening instrument for the full (and very eclectic) range of music that I listen to. It is WELL worth EVERY penny I paid for it.
When such an artist as Ken gets the opportunity to bring one of his ideas into existence, Beauty Happens!!!