I have Fibaro Dimmer 2's also for all lights in the house. A few tips if you're at rewire stage but haven't started yet.
1 - As @BorrisTheCat mentions you need deep boxes. Whether dry line box in plasterboard wall or metal backbox in brick/block, make all the boxes for your light switches 47mm deep as standard. That'll allow you room to fit a Z Wave or Zigbee module behind a standard switch.
2 - Use retractable switches rather than standard toggle ones. Push on, push off, push and hold to dim. Using retractable switches will also help where you have two way (or even 3 way lights) with more than one switch controlling the same light. The module just sits behind the switch that contains both the permanent line and switched line connection - the second or third switches just connect in parallel.
3 - Neutral available at switch. Not essential but will make it a lot easier. Most dimmer modules don't need a neutral but standard switch modules usually do. Historically in the UK most house lighting circuits would be wired using a loop system. Line and Neutral loops in and out of each room, then in each room a twin cable goes between the fitting and its respective switch. There are two ways to ensure there's a neutral available at the switch. First option is to do the loop in circuit as normal but install a 3 core and earth instead of a twin and earth between each fitting and its switch. The second is to have your electrician wire the line and neutral loop between the switches rather than the ceiling fittings (with a twin and earth supplying the light from the switch). I've noticed this method becoming more commonplace (probably as it makes it virtually impossible for someone to cock up replacing a light fitting with only one cable available!)
There are a couple of options for retractable switches. I use the MK grid modules but there are others.
Another plus for using dimmer and switch modules with standard switches...If the hub happened to go down, your lights work as normal as each module will work independently - the dumb switch connects to the module which in turn operates the light.