[TenMoonsNorth]

Here is what I want and in order of priority:
 

• Closed  over ear headphones. These are for portable usage but I can use an Alpen so they don't necessarily need to be easy to drive. I also do not like wearing IEMs.
• Detail. Preferably at HD 800 levels or as close to it as possible.
• Neutrality. EQ can fix problems but it can only go so far.
• Large soundstage.

 
My budget is currently unlimited but a mixture of high end and flagship options is welcome. This is more about finding out what my headphone options are, so that I can look into each pair in more detail.
 
Possible options I currently know of:
 

1. Shure SRH940 - It doesn't have the sound stage but it's detailed and neutral. Price is also good.

 

[blueangel2323]

AKG K550 - definitely neutral and huge soundstage for a closed can. Not sure if you would consider it portable though. I think there's a version (K551?) with a detachable cable so you can replace it with something shorter.

 

[GREQ]

The only three closed back/portable headphones (out of the ones I've heard) that I truly like are:
 
Sennheiser Momentum (closer to HD600 in overall flavour than HD800) - I own it.
Bang & Olufsen Beoplay H6 (a little more neutrality and detail retrieval than Momentum)
Ultrasone Edition 8 (detail is in the same ball-park as the HD800 and has a very similar level of intimacy and a VERY communicative, intimate sound)
 
None of them compare in soundstage to the HD800 though. Not even slightly. 
Also all of them have a stronger bass slam and apparent sub-bass response than HD800 because of the closed-back design. 

 

[weirdfishes]

What you're describing sounds like a Fostex TH-900, currently one of the best dynamic headphones, closed or open. Detailed, wide, natural, with good bass response. But $2400.

 

[ScaryFatKidGT]

I'd say K550 but if you want HD800 like detail yeah TH-900  or Beyer T1's