One printer that isn’t mentioned as much is the Qidi Q1 Pro, which looks like a killer value.
I personally have an A1 because it was really cheap in my region, but Bambu has done a bunch of anti-competitive things by blocking third-party software, so if I had to start over, I would get something else.
Other good options I think would be the Ender 3 V3, Sovol SV06, and maybe even a Prusa MK4S if it’s within your budget. The cheaper printers are perfectly fine though.
I’ve tried Shapr3D and it seems pretty good. Not open-source though. I’ve heard blender is a really good option if you want that, but I’ve never tried it as I don’t really do much 3D modelling