For me Stoli Red is the best value for money.
I'm not much of a vodka drinker, more so wine, gin, and scotch. Moreover, if I do drink vodka; it tends to me something like Belvedere, Ciroc, or Grey Goose.
When I drink Stoli, I drink it because of its distinct flavour, rather than it's price, therefore, I would rank it on the same level as Belvedere. I'd say Ciroc and Grey Goose in terms of quality, but at the same time they are quite different drinks - not really traditional vodkas, in the eastern european sense.