Header sizing

Hi,

I have been racking my brains over it for a while: Where do I place the brand logo? Should it be inserted as header wrap image/ header inner background image/ site logo/ site tagline?
Also what size should the image be for it to be centered and evenly spaced between the fixed nav-bar and the content container start?
I really need the help.

Website: https://www.akioneam.com
Right now I have used a rough sketch with size of 1200px x 230px. I have tried various placement and adjustments but nothing seems to function equally well on the various screen sizes.

Thanks a ton in advance. ??