No, I have an ISP supplied router at the moment while I wait for 6e support on openwrt.

You should see similar numbers for the RT3200.

On a 80 Mhz channel with a wifi6 client device, I hit 700/500 (PHY rate is 1200/800).

I frequently see reports of 930mbps (maxed line speeds) with 160 MHz on openwrt forums, assuming you can set up an AP with 160 Mhz.

160 MHz channels are not allowed on the 5 GHz band in Canada, so I currently do not run 160 Mhz.

6 GHz will have plenty of 160 MHz channels, so as you can see that's why I'm waiting for that.

With 80MHz channels configured (160Mhz are possible, but I do not need/want that) on the 5GHz band, I can get about 480Mbps TCP bandwidth over the air using iperf3. Client is a laptop with Intel Wireless 8260 running GNU/Linux.

Reports on the OpenWrt forums I've seen range up to ~800Mbps.

I use one on my full-duplex gigabit connection and it generally sits in the 800-900 Mbps range. This will vary depending on things like if you decide to enable smart queue management (SQM) or other features.

There are some recommended tweaks I've applied but so far I like it much better than my old WRT3200ACM unit. https://openwrt.org/toh/linksys/e8450?s[]=linksys&s[]=e8450&...

More important to me, how stable is it? My WRT3200ACM has good peak bandwidth, but it can't deal with interference of other routers and needs to be rebooted frequently.