Although I haven't owned one, I have friends that have the Dl03 and love it and been very happy. I have owned a Grado Statement Series (long time ago)and always felt it maintained a veil over the music and wasn't revealing enough for my taste's. I traded it for a Benz which was more money but it showed me how much I was missing.
Probably not much help for you, but I would lean towards the Denon over the Grado, I can't speak to the others on your list.
Probably not much help for you, but I would lean towards the Denon over the Grado, I can't speak to the others on your list.