I have thought about a total change of taste and go for Harbeth but there is no dealer in Sydney
Harbeth is an excellent idea - pity you can't hear them locally. Sydney Opera house use ATC - thats another British brand worth hearing if you have the itch to change. I expect they'll have a local dealer in Sydney as bands like INXS and ACDC used ATC. I' d suggest you try to hear as much as possible - you don't sound "100% sold" on the Wilsons...