I've used the fujinon 90mm, which I believe is the same used on the Fuji 6x17 and can attest to it's quality. Sharp to the corners when stopped down past f/11. Only downside is that it needs a center weighted filter.
Thanks, do you have any examples with and with the CF, I assume you mean the f8 revision of the fujinon 90mm. Ive got a feeling that a CF is an advantage with all of the 90mm at f8 and less of a problem as you go to f6.8 - f4.5. But as the numbers go down, the price goes up..