Thank you for the reply jackd. Bob is a very intelligent and honest guy, but I wanted opinions from audiophile/music lovers. The Bliss Jubilee's have just been released in the US so it might be some time before I get feedback.
I own the Bliss Silver's and they are excellent. It is a little strange that the Bliss Jubilee retails for less than the Bliss Silver, but there could be a good reason for this like improved efficiency etc.