I'm not reviewing, just making some personal observations.
Long story short, if the Momentum is uncomfortable, then try the Nado Hp 50s.
I think at its current price, the HD 558 is a better buy than the HD 598, is a richer, fuller sound to my ears, though a tad less refined than the HD 598.
1. Open Back headphone listening at home - I really like and prefer the Sennheiser HD 600. It is rich and resonant, yet not overly warm, as can be the case with the Momentum and HD 650.
For mobile listening, I like the Momentum.
For something to listen to while snowblowing outside, I like the Panasonic HPX7, they are only 30 bucks, and the infamous mod takes that nasty mid range hump away.
The HD 25 is on sale now, at least last I checked, and that would be a good durable dj phone, but if you th
ink the Momentum is uncomfortable .......
The pads kill me m8. The main proble is not the confort, is the fit.
I have 67 mm years wich is not much bigger than average and still its a veeeeeery tight fit. They fit but yhe proble is that it is really easy to loose the seal. If i turn my head on a 90 degree angle or more for example i can easily tell that i loose a bit of seal because it is noticeable on the bass and that kind of anoys me in addition to the tight fit. They are nor the most unconfortable pair ever but after 45 minutes my ears start to ache a bit. If it was not the fit and loss of seal the momentums would not go anywhere because they bettter than the hd25s in every way.
About the home headphones i am still a bit confused about wich one to get. I was leaning to the k550s because they seem to have a bit more bass and also are easier to drive since i mostly use my ipod touch 4g.