Good thread Nines - I think we may have had this conversation. I have several all from around the same time (the summer of 1969) and I'm really not sure which would have come first. The Stones at Hyde Park I've described elsewhere, but the others from around that time were all at the Albert Hall - Led Zeppelin at the 'pop proms', Moody Blues supported by Elton John and Ten Years After supported by Jethro Tull. The best of those would have been Led Zep though.