Thanks to everyone that posted - I got a V30 from ebay to put in my big 2x12 Zilla cab with my Fender Supersonic head. I like the combination better that G12H100/CL80 combo and the G12H30s that I had tried before - the cleans are more glassy, and the distortion is very marshally, for want of a better word.
However, whilst waiting for the speaker I plugged my Supersonic into the 2x10 Weber 10F150s of my Vibroverb - and there was instant rapport - even though Fender designed the Supersonic for a V30, it sounded very 'blackface' through the Vibroverb (which highlights how 'brown' Fender's sound different). Perhaps being a Fender amp fan I just don't like Celestions and the British sound - so I am contemplating whether to replace the Celestions with some Weber 12F150s = trouble is they costs a bomb..... :x