I ended up getting a Dream Machine Pro, and I'm so glad I did. The amount of configuration that can be done is outstanding. Setting up vlans, routing and firewall rules, and pretty much all settings is very straightforward. I was also looking at the Synology routers, but they looked more geared toward basic home users. I can't comment on whether they could have done what I needed, though. Maybe they can. They do get good reviews. I needed to be able to set very specific firewall rules between networks in certain directions only, and the UDM does it perfectly.
One other benefit I've found is that I no longer have dhcp issues with my Starlink internet. Every once in a while, during a long Starlink update, my Asus router would drop the wan ip lease, then pick up a 192.168.100.x lease from the dish and hold on to it, even after the dish comes back online. It has to do with how Starlink does their dhcp. I had to unplug/replug the wan cable to get the Asus to get a correct ip again. I eventually put a dumb switch on the wan side, power cycled by home automation when the internet went down. With the UDM, it doesn't have this problem. I know this issue only applies to Starlink users.
I highly recommend Ubiquiti equipment. Enterprise gear at home use prices.