Router/mesh recs?

home wifi problem can be cause by signal interference as multiple wifi access points use same wifi channels.

there are many wifi channels (https://en.wikipedia.org/wiki/List_of_WLAN_channels)
i use wifi analyzer app (e.g. https://play.google.com/store/apps/details?id=abdelrahman.wifianalyzerpro)
to find channels not used by my neighbors wifi then set my AP to that channel.
using channels in 5+ GHz bands will also reduce interference probability as they have more channels than 2.4 GHz band.

setting AP to 20 MHz, instead of 160 or 80 MHz as default in new AP hardware, will further reduce interference probability.
it also reduces power consumption of wifi clients (smartphones etc.)
20 MHz will give around 200 Mbps which is actually more than enough because a 4K/UHD HDR stream only needs less than 25 Mbps

One more for the road....

You mentioned Unifi Amplimesh. They have another product you will want to check out. The UniFi UDR goes for $199 USD. The UDR allows you to enter the UniFi ecosystem at a retail price point. Supporting up to 500Mbit/s internet speeds this is a gateway product with enterpise grade network management. It provides 4 gigabit switch ports, 2 of which are PoE and gigabit wan port. At the top is a powerful Wifi 6 4x4 MIMO access point. It fully supports mesh networking with any of the UniFI wireless products (sold seperately). You wont find a better insight into residential  networking. With a five minute mobile phone setup routine and the ability to configure the rest from anywhere on the planet, tech support just became a whole lot easier -- UniFi Dream Router , More Info

I cannot adequately express how good these devices are. They are a joy to use. For the linux geeks, if you want to know whats under the hood so to speak checkout this bash script to setup letencrypt certs across a range of their products. It should give you a feel for whats running on them.

Revised... see below

Amazon for the win! Becoming a prime member is only $60AUD per annum here, free delivery for most things and Amazon prime video is thrown in for free... take my money!

Thanks, everybody! I went with an ASUS RT-AX88U which is probably overkill for what I need but Amazon was able to deliver it to me same-day which was important. 😛

I'm investigating PFSense. It has a native (garbage) hardware platform available, but runs on most super-bad multi-NIC mini-appliances. Also, so cheap, I'll be doing an HA pair! 🙂