Shane D
Headphoneus Supremus
For me the HD58x is a brighter, V shaped HD compared to the HD6xx with a slight loss of detail in trade for the greater bass punch and a bit more energy up top. My suspicion is if you were unimpressed with the HD6xx, you probably won't find the HD58x anything amazing either. I did do a compare of the 4 budget Massdrop made headphones awhile back. AKG 7xx, He4xx, HD6xx and HD58x. Its on my blog (link in sig). (Search for shootout or massdrop).
I did read that. Very interesting. I had and moved the HD6XX's. I am currently not real impressed with the HE4XX's. They are currently on a "time out".
I will bring them back out in a week or two and give them a solid week to impress me. If not, off they go.
I may be expecting too much at this price point, but I'll try anything once.
Shane D