1. It's solid, shape is different than the Abyssus and WMO and that's preference. I wouldn't label anything as best because that's all subjective.
2. Yeah that's just a normal WMO with a non-official paint job, Takasta is a reputable seller and he posts on OCN occasionally .
3. Preference if you like the shape, G100s will track faster speeds than the WMO if you deal with any sort of skipping or negative accel with the wmo.
4. It's good, just need to get one that doesn't...