Now that I've spent a little more time with the Tribute 7 I can post some (maybe still premature) impressions. They've got about 100 hours on them now. Overall these are keepers for me. They are very energetic, intense phones with a thick full-bodied sound. Bass is satisfying and the mids and highs are beautifully rendered. Treble is crisp and accurate, reminding me of balanced armature iem's at times. The aluminum earcups are beautiful and luxurious. The added heft is not a problem for me comfort-wise. Now for some brief comparisons: vs. Signature DJ: Both are bassy and intense. When it comes to the lowest of the low sub-bass, Sig DJ has more of it. Whereas the Sig DJ's bass hits a little harder, the Tribute 7's bass is more textured and nuanced. Tribute 7 has more mid-bass which makes them sound warmer. Treble is more detailed on the Tribute 7. Instrument separation and imaging are better on the Tribute 7. Tribute 7 is the better all-rounder. Some may prefer Sig DJ if EDM is all they listen to. vs. Edition 5 Unlimited: They are similar in terms of clarity and resolution. Bass is tighter on the Tribute 7. Tribute 7 sounds thicker and warmer. Ed 5 has a more laid back presentation with a larger soundstage whereas Tribute 7 is more energetic and speedy. It will come down to personal preference, but overall I think both are the best of what Ultrasone has to offer. vs. Edition 8 Ruthenium: Ed 8's bass is loose and unfocused compared to Tribute 7. Ed 8 sounds completely deficient in the mids and have zero warmth. Tribute 7 sounds much warmer and fuller. Treble on the Ed 8 is sibilant compared to Tribute 7. Tribute 7 wins here on all accounts. I personally was never a big fan of Ed 8 - it always sounded like something was missing from them and the soundstage/imaging feels kind of unnatural.