04 Tc 450 clutch master cylinder, what size to buy for lighter lever pull

Clutch master cylinder is broken, I found several new magura clutch masters on line and was wondering what size would give me the lightest pull, 9.0-9.5-or a ten. If memory serves me correct smaller will make a lighter feel, but my logical side is saying that's backwards. Darn multiple personalities anyways Thanks in advance for your input.

A smaller diameter master cylinder will take less pressure to use--but it will need to stroke farther than the stock master to get the clutch to release.

9.5 is stock just for reference.

Sorry for slow response, stuck a 9.5 back on, works great thanks for reply.