Absolut (Swedish) is my go to vodka, as even in Poland it's widely available and good quality.

From Polish brands, black Żubrówka, Ostoya and Chopin are good. Normal Żubrówka (the one with grass) is nice as well, but it's not neutral vodka (recommend with apple juice).

And obviously Belvedere is the fancy brand.

Personally I found Krepkaya the best I have ever tasted. Unfortunately very hard to find in my country these days