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Vesh - it's probably a matter of taste.... :|
I once had a Russian swearing to me that Russkij Standart was the very, very best there was, so I tried it - and I quickly switched back to...

Stolichnaya and Moskovskaya are pretty readily available here, even in some supermarkets; Krepkaya is harder to get hold of, but possible....

But it has become more difficult to find Russian vodka...