So I just picked up a set of Momentums and was wondering if I should've picked up the 1Rs instead. From the descriptions I've read in this thread, it sounds like the two have similar sound signatures, but the Momentum beats the 1R in terms of detail, extension, and speed whereas the 1R has the edge in comfort and soundstage. Does that sound about right?
I felt like the soundstage on the Momentum was closed in and congested compared to the 1R. The Momentums were comfortable to me but the 1R was even more comfortable. The Momentum did sound more detailed. If you are interested in soundstage the akg k545 might be a good option for you. The k545 is pretty much a compact version of the k550, but with several improvements. They are supposed to have an even bigger soundstage than the 1R while also having tighter bass and slightly better detail. Not sure about the comfort though.
I have been considering selling my 1R and buying the k545.