[Q] s5 4.4.2 NG3 - Whats my update + root options?

Hi all,

Just went back to my previous s5 phone, rooted with towelroot awhile back. It is currently sitting on 4.4.2, NG3 baseband. I searched around but everyone seems to be on the OF versions now.

I'm wondering what my options are to be on the most up to date version and keep root?

Thanks!