I went from a sidewinder x1 to a 300 2.4 and I love it. The built was a lot of work but it was extremely rewarding. Once you get it full set up it’s consistent just load and print, but if you are not confident in your ability to tinker don’t do it. I set up a custom webcam mount, a custom nozzle wiper modled after bambos, a nevermore filter and frame thermal expansion then invested a ton of time in start up scrips and now it’s no work to print anything but it was a lot to get there. If you go this route skip the drag chains and go umbilical, that’s my one regret.
Edit: also consider going 350, you lose a lot of z with mods etc, I would also have gone 350 instead sorry.
Are you using your router as DNS and DHCP? With Verizon I had a security setting that was blocking public DNS entries to resolving to local addresses. I can’t remember what it’s called, but it’s to prevent a certain type of attack. For a while I disabled it but switching to pihole as DNS, DHCP and using unbound solves it without the security implications