I had the 850 v7 prior to the v100 mandelo. It was a surprisingly good bike, considering the bhp and torque numbers. Handled well too.
Adding the full fat 850 would be a big improvement in the power department, but it would detract from the purpose of the v7 which is more about relaxed riding. It's the better built version of the Brit bike look-a-likes. A Guzzi being a Guzzi.