I've got Potenzas, but not the Pole Positions. They are good tires in my opinion, and provide a nice roar at high speeds (keeps me awake at night). They grip very well also.
I say go for it, even though they are a little pricey. They are worth it.
EDIT- Now that I think of it, perhaps the excessive tire roar is due to the fact that I have only driven on them when I have had 20-30k miles on them. Didn't own the car when they were brand new.