A few months back I decided to buy a bunch of airplane bottles of vodka and do a blind taste test.
Absolut Grey Goose Ketel One Stolichnaya Smirnoff Skyy
I do not remember the exact order of ranking. What I do remember is first second and last. Sadly the best tasting vodka was also the most expensive, Grey Goose. The runner up was Skyy. In last place and tasting very similar to rubbing alcohol was Absolute.