It was interesting rereading this thread after so long.
My Senns have been my go to since 1993. But those tweaked HD580s (
HD600 grills and HD650 cable) finally got to the point where they no longer made sense to repair so I bought a new pair of HD600s this past December (
which I fit with a 6' NewFantasia cable). Not bad for well over two decades of usage! To my ears they sounded the same so I'm once again a happy camper. I did also elevate this with the addition of a Schiit "stack" to drive them. Very very nice.
But more to the point of this thread. I never was much of a DAP guy. I had (have) a decade old Samsung 512Mb YEPP MP3/FM tiny portable I used with my AKG K81DJs when exercising back in the day. Still have them with replacement earpads and a HD25 headband pad affixed to buffer the metal band from my bald head. And yes, I'm still using and enjoying my Philips SHL5500 I acquired in late December 2011. The pads are original and still supple. The hinges work just fine, thank you, and have developed NO cracks. They sound great out of my xDuoo X3 too. No they're not in the league of the HD600s but they're much more comfortable than the K81DJs and don't exhibit the over the top bass of them either. Bottomline, as so many said early in this thread, they're very pleasant sounding (
inoffensive if you must), comfortable, work great for portable out and about use (
with their short 4' / 1.2m flat cable), and back then great bang for the buck (
mine being just ~$25 shipped). They were also said to be voiced essentially the same as the later Citiscape Downtown model which also used a similar if not identical 40mm driver and found favor with Tyll at Innerfidelity.
Never had heard any of the newer and more upscale Philips cans but based on these I definately would give them a solid look see were I in the market for something solid to augment by Senns