I've had some stock Denon D2000's, and wasn't a fan. Despite the lack of clamping force, they still weren't all that comfortable and I didn't like their sound signature that much. Just felt a bit sloppy. I'm sure some will recommend Denon D5000, and while I'm not adverse to the idea if they are what's best in my price range, I'm initially disposed against them based on my impressions of the D2000's. I also have some Aiaiai TMA-1's that are fine for what they are (portables), but being on-ear is much less comfortable than circumaural, and it turns out I don't really need the portability, either.
I have some IEMs that I really like (Earsonic SM3), but at my job I have people pop-by regularly, so taking them the IEMs in and out frequently gets tiresome. I still use them when it looks like I'll have an hour or so un-interrupted, but I generally can't count on it.
So, what do you recommend in a good closed set? I want comfort for 8-10 hour (non-continuous) wearing, glorious sound, and not too delicate. My audio chain is: flac -> asio4all -> foobar2000 -> USB -> Gamma 1 DAC -> M^3 amp -> headphones