Z61M models with MaxBright screen?

[Weogo]

Hi,

I need a bigger screen than my X41 Tablet and am considering getting a Z61M.

I would like to know exactly which 15.4" 1280x800 Z61M models have the MaxBright screen.

I have read that it is 300 nits, but haven't been able to find a spec for the contrast ratio?

I looked at an old TABOOK and the LTWBOOK and couldn't find the information there.

Thanks and good health, Weogo Reed