Today I went to a shop and listened to the Momentum Over ears and the Sony MDR1r from my phone. I've used my phone with the Dolphin's pretty much the last couple of days so even if it's from memory only it gives a hint on how they compare.
As already said here before the Momentum's reminds quite a bit of the Dolphin's ( or maybe it's the other way around
). The Dolphin's feels more balanced with less recessed mids and more subbass.
The same differences was also obvious with the Sony's. The Dolphin's also has better clarity than the Sony's.
The price of Momentum was about $400 and the Sony's were $300 so I'm pretty happy with the $160 I spent on the Dolphin's.
Since I didn't bring the Dolphin's take this with a grain of sand but at least this is how I heard it.
Edit: oh, one more thing: I really didn't feel that any of the other two had significantly better soundstage either.Edited by peter123 - 3/6/14 at 11:56am