I just received my SigPros (bought from a fellow head-fi'er), and now have several hours with them. They are great headphones. Agree with most of what everyone's saying about them. These are the best sounding headphones I have heard.
They don't have the look of the higher priced headphones. In fact, they look like they'd cost $60-150... which is a selling point for me. I listen exclusively at work and leave them at work, so having them look like everyone else's headphones should help keep them from getting stolen. You don't get the "I just paid $1k" wow factor when you look at them, but depending on where you listen, that's for the best. They are a wolf in sheeps clothing and you'd need to be a headphone-centric audiophile to have an idea what they are.
It's when you put them on that you realize where the money went. Compared to my memory of the D7000's, they sound a bit crisper throughout the spectrum, but otherwise comparable sound signature. Solid, thumping bass in songs that call for it, beautiful male and female voices, at times edging towards too much on the highs, but never crossing over to sibilant or screechy. Wonderful but natural separation of instruments. Great isolation in and out, so you can listen at ambitious volumes and not worry yourself over annoying your co-workers (or embarrassing yourself with your Lady Gaga and NSYNC anthologies).
My only very minor complaints so far, are comfort-related: I could do with the headband cushioning being a bit softer. Most people probably won't have a problem with this, but my hair is thinning a bit on top, so my hair doesn't provide any built-in cushioning to speak of and the headband gets to feeling hard on top of my head after awhile. Also, the earcup cushioning isn't deep enough. My ears don't stick out particularly, but they still press lightly against the fabric-covered, metal inner wall, and this too begins to irritate over time. I'll grow ear callouses if I need to. Like these headphones enough.
They are nice and light, so their on-head weight is never an issue. Clamping is firm but not uncomfortable even with prolonged listening. The detachable, locking cable goes into the left earcup, which I greatly like as it doesn't end up constantly catching on the zipper of your hoodie/jacket/sweater/etc. Ends up being more out of the way. Materials aren't showy, but seem solid and capable. Time will tell about durability and cosmetic longevity, but I have some confidence. The leather on the earcups is gloriously smooth and supple.
Comes with a nice (but again, not flashy) leather-wrapped hard case, a large and a small terminated straight cable, and that's about it. "Simple, high quality, and to the point" seems to be the motif for this headphone and package.
I'm looking forward to getting back to listening to my music again, and not continually analysing what's not quite up to par. These fit perfectly into my lifestyle needs, and into my desired sound signature preferences.
They are listing at $1299.00 but can be had much cheaper by finding them used (like I did) here in the For Sale forum, or by calling RMC Audio (e.g., not by ordering over the internet with them).
Let me know if you have any questions. I can only A/B them with my Westone 4 IEMs at the moment, but can give you general comparisons from memory of my previous cans. Oh yeah, I listen to most everything that's not sung in German, although The Magic Flute is an exception there. So: metal, rap, folk, top 40, classical, opera, country, indie, etc. I keep my playlist on shuffle.
