I got my MrSpeakers Mad Dogs!
I don't think I could recommend another closed headphone for under 500 that's better than these (maybe even more than that). After just listening for an hour, I like them more than my memory the D5000, that's for sure. They're more balanced in frequency response, while still providing solid, hard hitting bass.
As for the smaller closed headphones I have used (P5, HD 25 1-II, DT1350) these are in another league. much better soundstage and a more natural frequency response.
They need a lot of power, though. Out of an iPhone directly, they are anemic (not a surprise!). Even out of the pico amp, they barely have enough power for decent volume and are also slightly thin and screechy. No, these need the kind of power I can get from the Continental (portable) or Burson Soloist desktop amp (I imagine the cheaper but powerful Lyr would work well with them, too).
I would not say these are portable cans. I can use them in a transportable setup since I have the hot and heavy continental and I'll be wearing them at a desk setup at work. But out on the street? nah, not happening for me.
In terms of speed, clarity and lack of grain, they are very close to the LCD3. Their technicalities are excellent, imo. Their soundstage is a bit less layered and does not expand around the head as much as the LCD3, but it still feels more 3D than the HD650 soundstage. Perhaps this is due to the faster response and blacker background of the Fostex planar driver?
They are slightly boosted in the 5 kHz region (or maybe higher. don't quote me on this). Not a sharp boost like Grados, but just a little more boosted here than the LCD3. it reminds me of the HD650 I have here - there's a little more bite to high pitched female vocals than the LCD3. They're still smoother in the upper mids/ treble region than the (excellent) Magnums since the Magnums have more treble peaks in this area.
And they're comfortable! I got the comfort strap option for the Mad Dogs that adds a leather strap below the regular Fostex rubber headband. I think I would recommend this option for anyone - it's only an extra 15 bucks. There's some clamping force on my cheeks but I have not yet attempted to stretch the headband to reduce the pressure. the pads are soft and distribute the weight well.
I already ordered the vmoda "audio only" cable to replace the longer, and less portable friendly, stock cable (it connects with a 3.5mm connection to the headphones). Since I plan to use these at work with a portable amp, it seems like a fair investment at only $12 plus shipping
These are keepers. To the point where I'll need to do some mental gymnastic to justify keeping the LCD3. To be clear, the LCD3 are better. But maybe I'd rather have the Mad Dogs and go on vacation next year... hmmm.