Just gotta say that I've got a set of TripleTreds on my Sienna, and I think that they're the best all-around set of tires I've ever had on this or any other car. Good traction in rain & snow (for a non-winter tire), stable @ highway speeds, decent-wearing, fairly quiet, ride good if not exactly plush.
I has Nokians (WRs?) on this vehicle before, and the Goodyears are much quieter and longer wearing, while having almost-as-good snow traction.