To all who are wondering, I have the premium 600 ohm version. I'd rather not experiment with new pads because nothing is inherently wrong with the original pads. I think it just is the cups in general. While I'm sure that the hd598 is a great headphone, I'm afraid it just will be too similar to the 595 which has failed to musically convict me in the way that the Beyers have. I feel like I would prefer the darker sound of the hd600 and would enjoy the contrast from the brighter Beyers. I actually appreciate a darker SS as long as it doesn't muddy things up (which is why I will stay clear of the hd650).
Does the 598 compare favorably to the 600 in a way that would keep me from feeling I had completely downgraded from the Beyers? Does it have the genre bandwidth, detail, and dynamics to keep up with the 600? Also, does it completely outclass it in comfort? I expect it to be lighter, but how about other areas?