Check out Bombay Dub Orchestra.
Also, if you can find it, anything by Psychobaba (or Saicobaba) or Yoshimi (either her recent solo stuff as Yoshimio or her band OOIOO). On the more ambient side of things, there's Yagya, but his stuff has gotten really expensive and collectable for some reason. On the more folksy / acoustic side of things, there's Barn Owl, The Observatories, Arcn Tmpl, and Ghost.
I'd also recommend checking out Appalachian guitar music, for instance Alexander Turnquist.
And of course, the ultimate recommendation I could EVER give you: Popol Vuh.
The original Stax Lambda (normal bias) is still my favorite in many ways, and it's usually regarded as one of the best. The later pro biased Lambdas will be good bets as well however. Really, so long as you can find one with the transformer for under, say $500, you can't go wrong. The Nova Signature is usually considered one of the best models along with the original normal bias one. The (non-Nova) Signature is also a good bet.
Do you want a closed full-sized, or an open?
The best closed full-size I could recommend, with a sound signature you'd like (knowing what I know about your tastes), is the Paradox. It's based on the T50RP, but LFF's mods are ridiculous and bring it up to the level of the HE-500 and beyond in my humble opinion. It's pretty much ruler-flat, too.
If you contact LFF he should be able to answer any of your questions or concerns. He tunes these things by ear, but he has an extensive background in mastering as an audio engineer and knows what he's doing. In the interest of full disclosure, I'm friends with LFF.
Otherwise if you want an open headphone, I'd still recommend you give the Paradox a consideration lol, but also consider the HiFiMan HE-400 or HE-500 (I think the latter would be more to your taste). As per Maverick's recommendation, used Stax gear is a nice bet, particularly the Lambdas. Also consider the Koss ESP 950 + transformer box if you can find it for around $600 or less.
Edited by MuppetFace - 9/21/12 at 3:53am