The FZ6 is a gem of a bike that always seems to come up for sale at good prices, even in the current bike market.
Personally, I say street fighter it. The headlight and gauges stick out so far because they are meant for fairings. This article on a persons street fighter FZ6 conversion has some great information in it that might be of use to you.
https://motorcyclemelee.com/yamaha-fz6r-streetfighter/