Best mesh system under 500€

[ToMaSoo7]

Hi,
I need to cover 3 floor house(324 square meters) + garden with wifi. Main router must be on top floor. Wired backhoul is not possible, unless i buy powerline as well.
I'm currenty deciding between:
2x Asus AC86U
or
Netgerar Orbi KB50
or
Netgear Orbi KB43

Whitch one is the best option? Or is there something better under 500€?

 

[Fyodor]

Do you have coax in any useful areas. MoCA is good for backhaul.

 

[ToMaSoo7]

Unfortunately no :-(
Wifi and powerline are only options for backhaul.

 

[pege63]

If you have a router why dont just buy a AP, there is the OPEN-MESH A42 or the A60, very good buy.