[Q] Want to upgrade to 5.0.1 officially. topic

Hello,

I bought Note 4 (Model: SM-N910F) in Germany, and now running android version
4.4.4, I want to upgrade to the official version 5.0.1 from website:
http://www.sammobile.com/firmwares/database/SM-N910F/

Which version is recommended from the website?
Debating between both versions: Germany or Unknown, Which version is preferable?
And do need root to flash a new version?

I am interested in a clean system with no additives/applications (in English) with good battery time.
Thanks,
idan.

xda-developers