I have an Anycubic S1 combo. Enclosed, AMS, networked, hackable (Rinkhals kliipper) . 700 hours on it and it's been fine. Layer 1 isn't absolutely perfect across the entire bed but as long as you aren't mass printing coasters with layer 1 designs, you won't notice. It's never been enough of an issue for me to bother tweaking the defaults.

But if this for a business, you should probably cave and get a P1S.

Prusa Core One with MMU or Qidi Plus 4 and the Qidi Box. The Qidi Box is at the pre-sale point now. They have been taking things slow with their AMS unit. Either printer is affordable and in the size range you want. Both are corexy, Qidi run Klipper and Prusa runs Marlin firmware. Both brands have heated enclosures to make printing fussier filaments easier. And PETG definitely benefits from that.

If I was starting over and wanted a larger printer, it would be a coin flip choice between those 2 printers.

I have a k1c and have pretty much printed petg exclusively. Works fine. I know creality has an amazing clone... haven't used that.

I would give vote for Prusa Core one. Not the cheapest but great support and very reliable work horse. Currently only option is MMU3 but they have announced that they are working new solution