My worries were based on contradictory reviews. Now having owned the AD900X for some time,i can honestly say that,for me,those worries were totally unfounded. I was concerned that on,for example,a YES track like Close To The Edge,would sound like a mess(including,but not limited to,"muffled"). Many prog rock tunes can be very complex with a myriad of different instruments coming at you all at once,..again,all of my music have none of that,they all sound very good and all the imaging is as it should be. I remember the specific moment when i finally realized just how good the imaging on the AD900X really is. It was when I listened to a Genesis album called The Lamb Lies Down on Broadway,but especially(and,actually,many other tracks on there too),on a track there called The Waiting Room. After that,i have never thought about any inadequacies of the AD900X's imaging abilities. The difference here is that,while some HPs may give you imaging that's "in your head" or very close to your head/ears,the AD900X gives it to you a little farther out and apart,which I actually like quite a lot. If it's in the recording and affective,you'll hear it as your supposed to(with it's sound signature and other qualities,of course). My worries of the AD900X's imaging have long been laid to rest.
Of course,all ears,people and their experiences are different,so I like to say YMMV,..i can't vouch for what everyone will hear. Also,my comments here are specific to the AD900X. also,imho,they are indeed worth $200(although,i paid $190 with a $5 coupon code,no shipping cost). I also think you don't necessarily have to particularly be an Audio Technica sound signature fan.