I have and really enjoy the HD-600's. Excellent for Jazz and Classical as well as accoustical music. Very comfortable. If you like aggressive sounding (forward placement) sound (especially rock) and can stand the way the Grado fits on your head (I find it very uncomfortable), that may be a better fit for you.
The typical comparison between the two is generally as follows:
Listening to the Senns is like listening in the 10th row center of an auditorium. Listening to Grado's is like being on stage with the band/orchestra. Grado's are very dynamic but I find them a bit fatiquing and a bit colored. Others find them exciting and the Senns too layed back.
As for electronics, I greatly prefer tube Amps with my headphones. The MG-Head by Antique Sound Labs is a very good buy at about $275.
Good luck.
The typical comparison between the two is generally as follows:
Listening to the Senns is like listening in the 10th row center of an auditorium. Listening to Grado's is like being on stage with the band/orchestra. Grado's are very dynamic but I find them a bit fatiquing and a bit colored. Others find them exciting and the Senns too layed back.
As for electronics, I greatly prefer tube Amps with my headphones. The MG-Head by Antique Sound Labs is a very good buy at about $275.
Good luck.