I've about 40 blue-ray discs and of these, about a dozen are concerts. Most are really good (the Led Zep Celebration Day falls into that category). Were I to want to show off my HT system or to test a new component, I would use Peter Gabriel's Secret World or one of the Nine Inch Nails offerings. For those of more Catholic tatstes, the blue ray reissue of the Grateful Dead movie is also outstanding though not quite at the level of the PG or NIN items. The visual quality of the Peter Gabriel disc isn't on par with the audio content IMHO.