Thanks for all the insight. Glen, the torque is what I like from an engine, I prefer my T150 to the T160 I had, and I prefer my 920 commando to the T150. I think your touring mileage is good and puts my mind at rest with regards to some of the bad things I have read about them, I do realise the initial build quality is important though.
I realise a bike designed in the 40s won't ride like a modern bike, but I seem to have developed an ability to enjoy my 54 350 Velo as much as my 1200 turbo Kwak, different bikes but both have there place and I believe I will enjoy a Vincent as well, Onder, when the Vincent was designed we only had lanes in this country so I am guessing they would work quite well in that environment, luckily I live in Derbyshire and we have plenty of decent bike roads.
I have found one that has been sorted for touring, It has Craven luggage, Mkll concentric carbs, a screen, twin discs, Avo dampers, Alton alternator, heated grips electric start and a sprung seat, i am not sure the discs are a good idea though, especially as Glen mentioned good brakes as a standard quality, but I think the rest of it has potential. I wonder If I could find a standard front brake setup.
Any advice on this, I would be asking questions about how It has been maintained because this may be one of the clapped out high milage jobs Nigel has warned about.