[TAF94]

Cnet gives these ratings:

HD485 - 7.7
HD497 - 7.8
EH350 - N/A
PX100 - 7.4

???

 

[facelvega]

I've heard all three (the EH350 is a refreshed and rebadged HD497), and I think the differences are less in quality than in variety and of course size. The're all respectable points in the lower part of the Senn range, though.