After lurking here on and off for about five years and making most of my purchasing decisions based off of existing threads, I have finally come to a decision that I may need some help with. I am a pretty big metalhead and listen to basically everything everything except nu metal and black metal(though there's always sepultura and a few other exceptions), but I for the most part prefer prog metal and some thrash ie porcupine tree, meshuggah, lamb of god mastodon etc. I do also listen to some folk ( bjork to dylan) and classic rock. Right now I am using an 02 amp/dac with my mmx 300 that I have had for a few years as I am also a pretty heavy gamer when I have time, and have only recently gotten to become more into music in the last couple of years. For portable use I have an hm603 and a dt 1350. My mmx 300 is pretty good for music and great for gaming, but I have been having the urge to upgrade for a while now tbh. And the mmx being a full can, it is kind of outshined by my dt1350 (which i find really amazing for prog metal for an on ear btw). I am looking to spend in the 600-700 dollar range, and am currently very torn between a t90 and a ps500. I am obviously a fan of beyerdynamic and their sound, but I don't have access to many other high quality headphones and really only have access to $200 sennheisers or beats to compare them with. I know that grados are usually love them or hate them, but I can't try them first. I would also probably put g cush pads on them for comfort. The he500s seem interesting as well but something about hem doesn't wow me from reviews I have read. I would appreciate any input from you guys as there aren't a whole lot of metal threads on here or reviews on the t90 yet. And it would be kind of weird to have only 3 pairs of headphones all by the same company as I am not really a fanboy but I'd rather the best for what I like in my price range.