Niko zigbee switches, or other recommended switches

Hi guys,

We are renovating our entire house, the next weeks i’ll be making the holes in our walls for the switches.
To be sure i’m putting cable to each switch to the fusebox.

Now i’m doubt which switches i’ll be installing.
The idea is “don’t use to much space” and “if possible not on batteries”.

From niko i found zigbee switches with 2 buttons, and also 4 switches but those are battery powered.

Another option is using “classic” switches (from niko as example) and use fibaro relays to make them smart.

Or can you guys recommend any other switches (that are able to be delivered in Belgium)?

Thanks in advance