I would love to take you up on your offer. I have family in the LA area and will probably visit them before the end of the year.
I think you took me too literaly...I wasn't passing judgemnent on tube amps, you are correct that I cannot do so because I have no experience with them. I think that all I said was that the vintage car analogy proposed by another poster seemed apt in that ones experience with an older technology can be as good or better than that with a newer technology.
I am looking forward to hearing a tube amp at some time in the future...until then, I am keeping an open mind.
Mark