For the type of bulb the 1G B12 uses, it needs the fluting to cast a proper beam.
V-bars? I'm not sure I understand what you mean. Clip-ons? Clubman bars?
You can run into fairing clearance issues if you go too low.
You can get fairing lowers for your bike from Lockhart-Phillips.
AFAIK, they're the only outfit that makes them for the 1G B12/6.