First off the only 'real' pair of headphones I have are PX200 ii's. Bought these last year for the portability of them, however I found that I couldn't use them on a plane or bus because of the poor isolation. I cannot decide between the hd 25s or m80's as an upgrade! From what I have read on them (quite a lot) I have gathered that to my ears there would be minimal differences in SQ. It seems that its now coming down to isolation for me, and while I know that the HD 25's have great isolation, I just wanted to knows if the M80's would suffice. I don't need to be in complete and utter silence but I would like to be able to be able to listen to my music on a bus comfortably. I know its an odd question but could someone compare the isolation to Beats SOLO as my friend owned these and they are the only other on ear head phones I have experience with. I found the isolation on these sufficed. I also tried the ATH M50's but ruled them out as they are too large.