@tgl
I'm in a metro area and in a condo so, yeah, 6ghz might be a perk and I've contemplated it a few times but, I just push my neighbors away with my config and get the speed I want. I did have a gig ISP plan but, switched to TMO to cut the bill in half and 2-3X the UL bandwidth and no data caps. Sure, it's slower but, it's consistent. It's got some quirks but, once you figure them out it's not a bad option.
Getting a 160mhz channel is just trial and error besides picking low or high. The issue tends to be no one configuring their channel and just letting their ISP device auto select and switch constantly. Locking down a channel though pushes those away to either low or high depending on what you choose.
The 320mhz is on 6ghz so, therefor you'll get less interference to deal with unless everyone upgrades to 6E which doesn't seem to be the trend.
For the 160mhz you can see the surrounding APs being pushed to the high band except for 2 of them. Doesn't appear to be any 6ghz APs in use which makes sense because well, it's either POS Comcast rental or ATT DSL in use with auto select picking the channels. Switching things up to AXE for me doesn't make sense as I already get good speeds on the LAN over WIFI and when I did have a gig ISP plan I could max it out as well.
The top two results are my primary AP and the TMO GW. So, primary pushes the secondary to the other end of the spectrum and if I swapped my primary channel to the high end then the other would drop to the other position. I have no control over the TMO box though for fine tuning anything related to WIFI but, I could execute a script and completely turn off the WIFI but, I've been using it as a backup when going portable for some stuff lately.