Fostex T-50 Mk1 FTW!!!! It's the only ortho I've heard so far but it is supposed to be a good start. I did do something very unusual for an ortho, I removed the stock damping and run them open. It's most direct competitor is the SR-X mk3 (normal or pro) and the T-50 can't quite match the speed of the 'stat but more then make up for it with increased dynamics. The SR-X Pro is pretty much neck and neck with the ortho though and has much better detail retrieval, larger soundstage and more comfort. I should get my Aurex HR-1000 soon so I can add a Uni-electret supra aural to the stable and see how it compares to the other supra aurals.