It's a winnerOkay, I do not own an SR-71 to compare to, and I'm at the moment at work so can't compare to my Ear+ HD, but I can type that the Hornet sounds simply phenomenal.
Initial impressions, based on 20 minutes of listening. The midrange is forward but ultra smooth and organic sounding, similar to my tube amp. Bass is full, textured, fast, and detailed, and the high end is sweet without a hint of glare or harshness. Cymbals have the right shimmer and decay, and I get a sense of weight from the hits. I also get an overall sense of three dimensional space and perfect instrument separation.
I'm using my modified Nano (iMod Nano) as a source and pumping Apple lossless through my HF-1s and my Sensaphonics 2X-S. I'm hearing home system quality sound from a package that is in total, 2 x 3.5 x 1.25 inches. Stoked!
I'll snap a few pics for the appropriate thread, but will end by typing, hold on, you are in for a real treat!