I'm heading over the the course this morning as Bridgestone is putting on a ball clinic. The purpose is to determine what ball is right for you, and they don't even necessarily try to sell you on their brand. They have the launch monitor set up and they take about 15 minutes to let you hit different balls, including your own current ball, then they make a recommendation... which may just confirm that you are already using the best ball for your swing.
I'm looking forward to seeing what the results are for me.
BTW, as far as the best spinning ball.... I've never found anything that I can spin as well as I did the old Titleist Tour Balata that I used to use. Modern balls a re far mor durable, but even the best don't spin like those old balata balls did for me.