One thing I didn’t think too hard about when building a European 3D printer (the Prusa MK3s): where am I going to get filament? Initial research indicates that cheap filament causes lots of problems; there can be issues with manufacturing tolerances, brittle/gummy textures, etc.
A little poking around suggests a couple of reliable sources/brands:
I’m still working on my first spool, so I haven’t tested either brand yet. Will update when I try these options.