I’ve been a big fan of the EERO mesh routers since they came to Australia a few years ago. There’s a huge range of them now starting with the regular EERO which is great for most Australian internet connections, ranging all the way up to the EERO Pro 6 which is great for gigabit connections.
You can either buy a 1 pack and add to it later, or jump straight to a three pack which will basically enhance the Wi-FI connection throughout your entire house, with most of them having two ethernet ports each.
For the rest of the best Amazon Boxing Day deals, you can see my recommendations HERE.