So many art kids got together in the 60-70s and made "prog." Prog back before it mean "this guitar solo is in 17/16 and this guitar solo is in 47/8." There is so much good early Prog. Genesis, Jethro Tull, Yes, King Crimson, Gentle Giant, etc... What is the modern rendition of this style of prog? To beat everyone to the punch: I know the Mars Volta exsists.