my top ones are as follows:
*Tesla- love '5-man acoustic jam', Frank Hannon and Tommy Skeoch just tear it up
*Queensryche-dig the MTV Unplugged Show they did, it was brilliant seeing Chris DeGarmo and Michael Wilton using their Tylors to weave in and out of great acoustic passages on songs like 'Della Brown', 'I Will Remember' and of course', 'Silent Lucidity'
*Def Leppard-seen many acoustic videos of them performing 'When Love and Hate Collide', 'Hysteria' and 'Two Steps Behind', among others
and of course, Heart and Led Zeppelin, plus recently caught a video of James LaBrie and John Petrucci of Dream Theater going acoustic...and also, the series 'Live From Darryl's House' with Darryl Hall [even though it isn't hard rock/metal, it's a great show!!].what's yours???