My trusty Sennheiser 497s (cheap) were getting on my nerves and I wanted to upgrade to cans for stereo listening. Not iPods, not MP3 players and no amps other than my Marantz stereo with ¼ “ outputs.   At the local brick & mortar, I had a selection of Grados, Denons and Sennheisers – about 16 in total.   Sennheisers 595, 515 and 485 – The best of these was the 595 with a glorious midrange and a diluted bass and unimpressive highs.   Denons D2000 had exciting...