I have upgarded my preamplifier from Joule-Electra LA-300 to 450, I upgraded my speakers from W/P-8 to Sasha but I have no wish, desire to touch to my Musician III Mk2 monoblocks. Now, Simon describes "magic" effects to his own system by E-SS Still Points racks and I am tempted a bit.
Yes, I would add my praise for Spectron: both product and customer support (I do not mean repairs but their advices )