I'm not sure what my swing speed is but I like using the "cheaper" balls compared to going out and spending an arm and a leg on something like the Titleist ProV1. I have found the Pinnacle Gold and the Wilson Jack are pretty good. One thing I won't use are all these so called high distance titanium balls. Those things are like hitting a rock.
I play a variety of balls, pretty much whatever I can get my hands on. The Titleist NXT's are good though. I've also heard that the Pro V practice balls are the same as the regular ones for nearly half the price. Anyone know if this is true?