Sorry, I was sleeping.
The PRO900 are very sensitive and low Z, they'll drive from anything. Regarding the others - no idea, I didn't care for the previous generation of Denon headphones very much (and none of them isolated very well), the new ones are supposed to isolate better, but are reported to sound very different, so I really have no idea or advice there. Polk, UE, etc are completely unknown to me.
As far as the "buy one HP ever" comment - this is something I see a lot of newbies do. And I think you're implicitly setting you up for failure, and here's why:
You won't really know what suits you (ergonomically, sonically, aesthetically, etc) until you get them in-hand and on-your-head. So being willing to buy-and-return if you aren't happy is something you need to accept. We can sit and make suggestions all day, and give you our opinions all day, but it doesn't really get you any closer to finding what you want except for saving you a lot of "discovery" time (for example, before coming to Head-Fi, did you know there was a company in Germany called Ultrasone?). So my advice is to pick something from the list'o'suggestions (or your own intuition) that you think will be the best choice, and it can be as petty as "this looks cool and looks like it will be comfortable" and try it out. If you have never heard hi-fi audio before, I'm guessing literally anything you pick will "wow" you, and you will probably be satisfied. But if you're looking for a Consumer Reports style "1-10 rating" of all headphones ever, you won't find one. Because it just isn't possible.
So for example if you like the AH-D600, give it a shot. And if it doesn't work for you, return it, and try something else. I don't think anyone here got their "headphone nirvana" on their first shot - so don't feel like you're doing something wrong in getting a pair of cans that doesn't suit you. If you can go and test models out in a showroom, that can be very helpful, because it can eliminate a lot of questions on your part, but ultimately trying the thing out at home is really the best option.
). SInce I have tried headphones before but not exactly like you see headphones (highs, soundstage, etc), although I do appreciate the bass to be booming and the lyrics to slightly come forward, and I still don't EXACTLY tell teh difference, I understand it is important in choosing a pair of HP. Would you say maybe I should get V-MODA/Beyer customs, that you can custom the sound as you wish (not sure if that's 100%accurate as I see it but it's probaby not)?
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