Well I sold my HD500 last week. Sold it and a 64 Tremolux to fund some more gear. My observation of the HD500 is that it is great if you want everything in one box. It's nice to have tap trem, delay, and other modulation. The amp models were killer and they sounded great through my tube amps and pretty good direct/phones. It played well with some of my pedals, but not my Les Lius which is why I ended up selling the HD500. Before the Les Lius, I used the HD500's /13 model through my AC30 with a few delays in the HD500. With the Les Lius, I was able to get the same sound, and then use some of my delays I had sitting around. So, I had fun and I have no complaints about the HD500. Very excellent piece of gear. I almost sold my amps to buy two DT25's to run with it, but am glad I did not now.