Are you thinking of laminate, engineered stone or any other material? Start saving photos that you like to a 'Kitchen' idea book for reference & to find what appeals to you most. This one is Caesarstone Nougat...The rest are quartz or engineered stone bench tops...

Modern and contemporary but with well crafted materials and textures such as timber and stone to add warmth and character to a space. It is also important to be site specific and enhance this.

I feel that you might be trying to fit too much furniture into this space, amitif. The space is quite a lot smaller than your photo example. As you can see from oklouise's drawing, your kitchen island bench will protrude past the pantry into the walkway, and this is based on quite a narrow space between the two benchtops (and doesn't factor in any space for stools at the bench, should you wish to have any). Ideally you would increase the width between the benchtops a little. Have you checked the sizes of your modular lounge to ensure that there will be sufficient space to walk through? There really isn't room for a separate dining table at the end of the kitchen, as you have drawn in your sketch. You may be better off increasing the overall length of the kitchen and incorporating a dining area on the end of the island bench rather a separate dining table...

Agree with some of the ideas already mentioned of artwork (maybe 3 small framed prints or photos hung vertically given the light you intend to install?) to fill the wall space, tiered stand with fruit, cook books on one shelf and the other can be used for storing stationery, mail etc using a stacked set of drawers (some nice ones available at the stationery/office suppliers). You can hang removable hooks inside the door for keys. I'm not a fan of having "stuff" (papers, keys) on bench tops as it quickly turns into a dumping area and in a thoroughfare, things end up on the floor as people rush past. Best of luck - your kitchen is gorgeous by the way!!