They're here! I got home from a trip to Costco today and they're sitting on the garage doorstep. I open up the box, knowing it can only be one of two things, and it's the K81DJs. I went right inside, plugged them into the nearest headphone outlet (my mother's iBook in the kitchen), and put on some music. The first thing I noticed was how huge the bass was. I generally don't expect this in portables, but these definitely had it. I liked them instantly. They were engaging and exciting, and they isolated very well, quite surprising for not only non-IEMs, but not even circumaural cans. From the first minute or so, I knew they weren't going anywhere, and they were going to be my new portable cans. Upon further listening, I felt the highs and mids a tad veiled, so I took out the foam inserts, and oh man! Cymbals had a brilliant crash again. I don't even remember where I put those inserts, but I doubt I will be needing them again. After a more extended shot with these cans, I do find the bass to be a bit much for my personal taste, and the mids are a tad 'scooped.' However, I still do very much enjoy the sound, and given the fact that I'll be walking around with them, and therefore rhythm will be involved, I may get to enjoy the big bass. The way it sounds, though, I will say, I feel this is big bass done right. I vastly prefer this to the DT770 or the HD5/6xx bass (eh, they're not quite in the big bass department, but they're close).
The one qualm I have is comfort. While I actually like the tight clamp, I do not like pleather or leather pads 90% of the time, and these are not an exception. They're just too hot for my ears, even in a cool (69 degrees) environment. 80+ walking in the sun will only get worse. Fortunately I ordered the velour pads the day I ordered these, knowing I would feel this way, since I always have, so I'll be sure and post an update on how I like them with those. However, I really, really like the isolation these pads give me, as well as the tightness of the bass, so I'm sure it'll be somewhat of a double edged sword. We shall see.
p.s. Since the subject of lower end Grados are coming up, I should throw into the mix that for rock, I prefer these. for acoustic, still Grado, I think. I currently own SR125s.
p.p.s. In short, ladies and gents, I am, I believe, firmly in the AKG camp.