Vulcan and SV are great cars, but just no good at the GT job, which i think would be essential in any car4life.
Vulcan is probably my 'if i could have any car' answer, but if it's 'one car only', its not street legal (yes ONE exists), nor really usable, so cant really be the only car.
You want theatre, speed, usable comfort levels, some luggage space (weekend bag would do), performance, handling, sense of occasion. etcetc.
Gotta be good for a sunday morning blat, and just as exciting a prospect for a run to the Alps, needs to be able to take you to a fancy restaurant and be able to spark conversation in a petrol station (not draw hatred!).