Good observations. Thanks. I think attractive thing about the PS500 is if it captures some of the PS1000 at the $600 price point. The question is if PS500 does this and how close it is. The Levi review has me intrigued.
I sold my RS1i to be able to get an HD800. After less than 2 months, I had sold the HD800 and bought a new RS1i
One thing is for sure, I'll never make the mistake selling these again. The Grados are one of the few cans where I stop analyzing and just close my eyes and be one with the music.
From what I've read the PS-500 is being compared to the HF-2, I suspect because of the similar construction. I have not heard the PS-500 so I have no first-hand experience. However I have owned the 325i and currently own the HF-2 and RS-1. IMO of the three phones the RS-1 is the best sounding, way less bright than the 325i and more evenly balanced across the sound spectrum than the HF-2. Both the 325i and HF-2 are nice phones, but the RS-1 is better.