I have had the PX200 for about 5 months.
I couldn't be happier. I use them with a portable and a stock Altoids CMOY. They really do sound very good. Good bass , sweet smooth mids and highs.
The small cups do need to be positioned correctly over the ear.
I don't like the short cord so I made a longer starquad interconnect for the CMOY. Used the gold Radioshack mini's . This works fine for me.
The PX200 seems to be very durable. I usually go to sleep with the phones on and they are on the floor or under the pillow when I wake up. I can't seem to break them
Also , when flying I always get compliments on the PX200 and the CMOY (Altoids- Girl in Red Dress Tin).
My other setup is a META with Senn 580's. The 580's are more comfortable. A little more detail. Bass on the 580's is probably more accurate but I really like the bass from the 200.
I had 580's and Meta before the CMOY and the PX200.
If I had it to do over I honestly think I could be satisified with the PX200 and CMOY. Sometimes I miss the Crossfeed on the CMOY, but it really depends on the CD.
I would not hesitate recommending the PX200.