That's why I suggested that you listen to it and decide for yourself. Deciding that you won't like a headphone without hearing it is not very different from deciding that it's great without hearing it. Try to give it a listen. The results may surprise you.
It's funny, I don't like the RS1 very much. I find it's treble to be "piercing". This was from listening to jp#'s vintage RS1 being driven by a top-notch source and amp. After listening to that, I figured I must hate the Grado sound. Then I tried an HP1 at a meet. What a difference! I really liked them. I've since tried HP2 and PS1 phones. Now I know that it's the John Grado sound I don't like. My main headphone now is an HP2. I'm sure glad I tried the HP1.