I just received my HD 598s (BB $150 price match of Fry's). While I will admit, I do wish that they had a tad more bass hit then they do, everything else.... WOW..... First off I'm running them with my e11. The sound-stage is great, I love hearing all the different instruments and they are so clear. I'm coming from IEMs (262s so quality ones) and m50s, so not amazing sound-stage. Voices are also pretty amazing, especially female. I know the Re-262s were suppose to be top notch for this, but believe the 598 blows them out of the water on female voices.
The comfort is amazing too. I've tried several HPs which claim to be over the ears, but still touch either the top or bottom of the ear which I hate. The HD 598 just touch my head, no ears. I wear hearing aids and genuinely believe I should be able to wear them with the 598s as they won't be touching the pads. My one last gripe is the cable. The end on that thing is unwieldy to say the least! I will definitely will be asking for a different cable for Christmas.
I have one question for people though. I would like to get a cheap DAC for my laptop. I was thinking the e10, but have read that any DAC/amp should be at least 6 times lower Ohms (not sure if I'm stating this correctly) than the HPs. The e10 low end in Ohms are 10, so that'd be less than 6 times lower. Is this an issue and should I try something else, or would you still suggest the e10.