Help me put together a good Speedbooster / Lens Kit to compliment my setup

[filmguy123]

I have:

AF100
Voigtlander 25mm f/0.95
Olympus 12mm f/2
Olympus 17mm f/1.7
Olympus 14-54mm f/2.8-3.5

Minolta 50mm f/1.7
Nikkon 85mm f/2
Minolta 135mm f/2.8


Any suggestions on "best buys" for a speedbooster + lenses?