Head1, thanks for the comments.
When I said in the past I meant it, nearly twenty years ago so its not relevant now. I was not looking for a dedicated classical music headphone, as that's only about thirty percent of my listening, or something so large which is always used hooked up to a music system or TV, but something potentially portable with a budget under 200 sterling. The L2, which in my opinion is a compromise, fits the bill. In the last few weeks I tested several headphones, both in high street shops which is not ideal but gives some idea, and from online store and only one other came close in quality and comfort, Sennheiser 558. Although a little large it had a lovely neutral open sound which is ideal for classical, but alas I must be one of the few people who had discomfort after a few days so returned them. I would definitely audition the L2 and also Philips X1 which has great reviews but is not as portable, or perhaps if you can wait, the X2 which I suspect will be released sometime this year. I presume you've asked on the recommendations forum as there are far more knowledgeable people around nowadays.
I was though, having another listen to a classical CD through my Onkyo amp last night, just one. Five hours later I was lost in the music and had to drag myself away, they are that good, although I have now made a two dB reduction in the bass, Beethoven's 5th was just too much. Probably wouldn't have had to do that with the Sennheisers but I now just prefer the L2's overall sound. I not sure what it is, the warm, the emotion, and I threw everything at it, choral, opera and every type of instrument. What can I tell you, they suit me, they're just magic.
I don't think there has been a headphone designed specifically for classical but the Beyer DT880 & Sennheiser HD600 are frequently recommended. Not so long ago they were around £175 and then for no apparent reason the price went up. So I have been looking at the newer headphones with comparable SQ and the L2 are definitely on my list. From your description and opinions of others it seems like a headphone that I could just enjoy the music and not analyse the technical aspects of the sound. As for the X1, the impression I get is a v shaped sound signature with much more bass than the L2 or L1 for that matter. It seems more suited to electoronic, dance, even gaming from what I've been reading. I'm not sure who Philips were targetting with their flagship model so yes, it will be interesting to see what direction the X2 will go in.