Thank you everyone for your support.
I went down with a really bad cold and fever on Sunday evening and didn’t have the strength to work on the project!. Now I am finally up and running again!.
I am happy to share with you how I managed the sizing for your reference.
First off I changed pictures.
Then I re-seized them to 1200 x 515 (21:1).
Even doing so and setting the stack appropriately, Impact was cutting it anyway on the top. I didn’t give up and out of the blue, almost by mistake I think, I though why not doing like this?
…eh eh. I just figure out: “why not saving the image with that little blank gap on the top, so that when Impact is cutting me out on the top, it shows me the full picture as it will cut the white part?” and indeed… success! it did work.
Like some of you suggested with custom settings it showed the full picture, but still cutting minimally on the top; I decided to go with 21:1 ratio, so I get a nice modern look throughout the site.
Thanks to everyone, once again for your encouragement and support.