I am new here. But I would like to share my 2c, as far I own or owned half of the machines discussed here.
First older.
VORNS I built 3 versions, 0.1,2.4 and Double Dragon, but I currently own none.
Instead, I got Troodon V 2, and it is great. It was assembled in 3-4 hours. The only problem is the tool head wiring, which was replaced once a year. It’s a good overall open-source machine. The only mod I made is Clicky
Muldex - have one fully enclosed with a chamber heater and built 3 others for customers. It needs a lot of work but is worth it. Being open source gives you limitless possibilities, and John (3D printing world) is great to communicate with
E3D .I was looking for years at e3D tool changer as a great base for tinkering, and in 2023, I got one from e3D for 1000 GBP when they got it discontinued. It is now heavily moded, enclosed with stone wool panels, 500 deg C high temp Revo, and the stock 200 deg C bed, prints successfully peek and Ultem.
I built my own design, 500x500x350 Corexy, back in 2021, with a chamber to 65 degrees C, duet 3 electronics, Hemera, etc.
I also have Tronxy Veho 600 in stock condition except for adding RPI with clipper, It is very slow but does the job for large parts.
Newer
I got QIDI Xmax3 because of the size and chamber heater an year ago. It works mostly
BAMBU LAB
I got my first X1CC in August 2022 as an early bird in KS. The week after I got it up and running I sold all my printers that have some secondhand value, Prusa MK3+, Flashforge Guider 2s ( best ever flash forge machine for ABS) , Flashforge Creator 3
since then, I got another 2 X1C, P1P, P1S, A1,A1 mini and X1E
95 % of the time, I use my Bambu machines, and the rest when the part is bigger or is a very exotic filament that Bambu is not able to handle. The main reason: it is easy. The Bambu ecosystem is so easy to work with. It is the whole package: slicer, app, printer, and UI
The conclusion is up to you.