#146 arrived here this morning, and i've spent most of the time since bunking off've work listening through my mp3 player. They're definately not shy in the bass department compared to my RS1s that's for sure.
Other initial impressions ... cosmetically mine are pretty good, fairly neat glue holding the aluminium to the wood (a little sloppy around the drivers, but with the pads on you can't see). Can't see any blemishes on the cups, not that i've looked under a microscope though, been on my head for too long. My only real criticism is the L/R blocks and the way the headband is attatched, as someone else mentioned, the blocks don't seem to be mated together too well, and the headband metal looks a little exposed.
One other thing i noticed, the lip that the pads sit over is both thicker and bigger in diameter, which might have an effect on how the pads sit/get pushed around.
The leather on the headband isn't as nice on my vintage RS1s either, less padding and it has a different smell. The cable is about as thick as a power cord, and the Y joint still looks a bit haphazard, but it seems pretty solid.
More sound impressions later, but they come pretty close to my RS1s so far, which is a good thing.