Greygoose, Belvedere, or Three Olives if I have the money.
Otherwise, Finlandia is great for the price. I think it's in the range of Absolut, but it tastes SO, SO much better. But only when chilled, of course. Warm vodka = teh nastiness.
All that absolut is really good for is lemon drops (Citron, baby).
But yeah, short of Everclear/Golden Grain, you can't beat the price to performance ratio of 151. And raspberry 151 even tastes good...assuming the bartender knows what he/she is doing.
Edit: by the way, I tried Svedka one time just to see how it was, and oh my lord, the only thing worse was Tangueray (or however you spell it) vodka...they should really stick to just gin.
Oh, and anything in a plastic bottle (i.e. mr. boston's, mccormick, etc.) doesn't count as vodka. It's sole purpose is to be used in punch with massive amounts of sugar, thus masking it's taste.
I also can't stand smirnoff or sky, but that's just me.