Lower control arm bushings

I'm rebuilding the lower control arms and I'm at the point of choosing which bushings to use. What are the Pro's and cons of Polyurathane and rubber bushings? This is for a street car that does have a lot of suspension work. It's a 318 soon to be a mild 360 4 spd and we have a ton of hills and windy roads here! So what is the best setup???