After some deliberation between waiting on the M-100, grabbing the COP, DT770 or 880, the ATH-900X and the AKG K250, I've decided to grab the DT-990.
Currently I just have x-fi soundcards (external on my work laptop, internal with front panel on my desktop) and a Fiio e5. Three questions: right now the 990 premium 600 is around $205 on Amazon warehouse, and the 250 is at $150. 1) What amp should I get to power these, in the $50-$100 range? 2) Would I be able to sufficiently power the 990 600 for that price? and 3) Is the premium model significantly better, in terms of construction, sound, ect? I was set to wait on the M-100, but I didn't want to drop $300 on a headphone that is right now a bit of an unknown quantity.
I bit on the 990 250 ohm at $150 for now, but got them through Amazon, so I can always return them based on feedback I get here. Genres: mainly EBM/IDM and some darkwave stuff.