Throw it right back at you, what do you use your bike for, or what do you want to use your bike for?
For distance touring etc. 2 up, got to be a V
For bimbling about the back roads and trails, Wee over V
For rippin the sports bike blokes a new one, V with upgraded brakes
For ripping the sports bike blokes and the V blokes on back roads, Wee ;)
For commuting distance, Wee (fuel consumption etc etc)
For having a ball, either .
BUT, you need to be honest with yourself and decide what you really want to use your bike for, and what you will use your bike for, cos that decides which bike pretty much.
(if that makes sense)