@OliHobs, if you were talking about stuffing the MDR-1R earpads b/c of comfort issues, I am sorry to tell you that the MDR-1R was the most comfortable pair of headphones out of the M-named-headphone trio: Momentum, M100, MDR-1R. hahah & I've owned all of em at the same time.
M100 have ridiculously shallow stock earpads that gives you maybe 14-15mm clearance. I had discomfort after 30 minutes using stock earpads. you will need the $20 XL pads for sure if you go that route. The Momentums Over-ears have tiny ear-cup diameter, so they actually fit ON-ear in real life for most people & you get the typical on-ear type discomfort from clamping ontop of your ears (tho the Momentums are not bad w/ real leather & their feather-light weight).
The drivers of the MDR-1R are actually slanted to give the back of your ears 22mm of clearance, so try moving the headphones forward to see if that helps. honestly, most portable over-ear designs give less clearance than the mdr-1r. I personally found the mdr-1r to be one of the most comfortable pair of portable over-ear headphones that i've tried. you will need to measure your ear protrusion from your head & figure out how many mm of depth you need. over 20mm is uncommon for portable closed headphones.
I haven't tried the Visio HP50, but I hear good things about it comfortwise. you will need to look up the actual earcup dimensions to see if it gives you more than 22mm of depth. also the akg k545 is another option if you are looking for portable. otherwise, you can go for the really big fullsized non-portable over ears such as the akg k550 or open options like the beyer dt880/990, akg k701/702/q701, or the sennheiser hd600/650. I really like my open HE400s with giant earcups, but planar magnetics are heavy, so it wouldn't be my first rec to someone worried about comfort issues.
Edited by money4me247 - 1/9/14 at 1:05pm