I took a look at the ratings of some German Audio magazins. This is what I found:
magazin Senneheiser HD 497 Grado SR-60 Sennheiser HD 495
Audio 65 55
Stereoplay 30
Stereo nothing...
perhaps someone can complete the missing ratings...
The points given by these magazins can not be compared with the points given by other magazins.
That is not much, and I suppose it won't help you

. The Sennheiser HD 495 was tested at the end of 1999. The number was quite similar to 497, so I mentioned its scores as I found nothing about the HD 497.
Are the Sennheiser HD 497 quite new?
I found nothing at audioreview.com, which is a very interesting site for audio hardware.
fragtal
edit: tabulators do not work properly...