The vibration levels on mine are reducing with mileage and are now no bother. I've had a Honda V4, and that had low levels of vibration, but if you want a truly vibrationless engine, try a BMW K1600 six cylinder inline. It is more like an electric motor than a internal combustion engine. When launched, a German owner posted a video of a one Euro coin balanced on its edge on the top box with the engine running at tickover - then ran it up to the rev limiter. The coin remained balanced on its edge until he closed the throttle and touched the coin, over it went. That was genuine as I found out by replicating it.
My now gone 1600 did have a very slight amount of vibration from the original gearbox - almost undetectable and would have gone completely unnoticed on any other bike - but pull in the clutch and then there was no vibration at all. Quite eerie. At tickover and wearing ear plugs, the only way to tell if the engine was running was to check the rev counter.