Most involving headphone? (Looking to upgrade from Senn HD-25.)

Greetings, headphone sages. I have a question that I don't have the experience to answer, so I would appreciate your input. These days I tend to be busy and stressed, and very much appreciate equipment that draws me into the music and encourages me to listen as opposed to reading, watching movies, etc. I have a great speaker/vinyl playback system (Shindo amps, vintage Tannoy speakers, Garrard 301 tt) but these days I'm finding myself drifting more toward headphone listening. Currently I listen to the Senn HD25-1; after some trial and error, I find it always propulsive and musical, especially for rock and jazz, which is mostly what I listen to. My ATH-M50s, though better in some ways technically, just don't involve me as much with the music; they can be a little plodding and fat to my ears. The Shure SE530s are too uncomfortable and intrusive-feeling. My old Grado SR60s are too fatiguing and bright. My question is, is there a higher-end, more capable headphone around with the same PRaT, excitement, involvement and musicality as the HD25-1? What has your experience been?

I listen to lossless files on a Macbook->Amarra/Bitperfect->HRT Headstreamer (awesome, by the way!). 

Thanks in advance, 
Alex

Ha, three votes for Denon. I never really considered them. I've heard mixed things, particularly that the bass can be boomy and mids grainy. The HD25-1, in my opinion, does scale very well—and the music through it sounds surprisingly exciting and dramatic—and a big part of it is the agile, deep and tight bass. The Senn always finds the bass line in a song and grabs on to it, and he highs are there but are discreet, never fatiguing. The ATH-M50 has more bass, but it's looser and boomy in comparison, and the music can sound plodding and slow. Is the Denon fast and agile?

In my experience, a lot of high-end headphones are voiced to listen to well-recorded female vocals and other spoofy audiophile recordings that don't rate as good music. I'm a music writer and listen to a lot of recordings, some of them indifferently or even badly recorded, so I need a headphone that can make most things sound musical. What makes the Denons so involving? Would love to hear more.

Thanks everyone--bump.

So, based on the recommendations in this thread, I got a pair of Denon D2000s, and I need your help with a quick question. Picked them up last night (used and burned in a 100 hours, apparently) and they are not at all what I expected. Wonderfully enveloping, very detailed, very musical, as advertised, but from what I read I expected them to be bass-rich and if anything, thumpy and bloated. This pair, on the other hand, strikes me as anything but, with a slightly spotlit lower treble, forward mids, an airy stage, and a very dry but slightly reticent bass. In comparison, my AT M50s are much, much bassier and thumpier. Do I have a bum pair or am I simply hearing a better grade of headphone. Or something else?

Thanks,

Alex