I wrote up a lengthy article on using (Leica/Zeiss/Voigtländer) M lenses on Fujifilm X cameras, looking at the Fujifilm M Mount Adapter and Kipon L/M-FX/M Adapter versions primarily, in use and performance. Enjoy, and hope it helps someone...
Nice write up.
I have the 90mm elmarit M 2.8 and a 90mm f4 minolta rokkor.
The latter is a nice lightweight and small travel lens that fits into your pocket.
I look forward to fuji bringing out a lightweight 90mm of their own. The 55-200 is a great lens but relatively heavy and largish.