But yes Chopin is my absolute favorite hands down, and goes down very smoothly.
Chopin is smooth, but doesn't have much of a flavor to it. Belvedere is worse, doesn't go down all that smooth and tastes a bit metallic to me. I actually like Pan Tadeusz quite a bit. It's cheap(er), but I'd rather drink that then the pricier stuff.
On a side note, "Tito's", made in Austin, is awesome! I had some when I was in the US, great vodka, and pretty damn cheap. Comes highly recommended if you like the clear stuff.