So far i’ve seen pretty consistent performance with most “standard” PLA filaments and very little of a difference between high- and low-cost offerings. Where do you typically buy your filament and are you noticing a similar “good enough” sweet spot?
https://www.youtube.com/watch?v=vbWIcAe0gEE
For standard types (like PLA) I routinely buy from the cheapest vendor. It invariably prints OK. For those times when I need specialty filament types (woodfil, nylons, etc) I always get a brand name (like Taulman or ColorFabb) since I have had a couple of bad experiences with those from no-name vendors.
For PLA I buy by color 
Fillamentum’s rapunzel silver and Iceland blue as well as Prima’s glow in the dark are my favorites for now.
@Dimo_Pepelyashev just be aware, the glow in the dark filaments are super abrasive. On the levels of carbon fiber abrasive. You should use a hardened nozzle for them.
@ThantiK thank you. I ordered it with two spare nozzles indeed