I'm on a budget and need balls for a ball machine. I would love to get the Tretorn Micro X but they are out of my price range. I've narrowed my choices to: Gamma Pressureless - $30 for 48 balls Penn Pressureless - $40 for 48 balls Wilson Pressureless - $7 a dozen so $28 for 48 balls (from Wal-mart) Unique Pressureless - $52 for 60 balls pro-rated to $41.60 for 48 balls for comparison W (Wilson) Team Pressureless - $60 for 60 balls pro-rated to $48 for 48 balls for comparison Slazenger Pressureless - $30 for 48 balls Slazenger Permanent Pressure - $15 for 18 balls pro-rated to $40 for 48 balls for comparison Gamma Permanent Pressure - $15 for 18 balls pro-rated to $40 for 48 balls for comparison I've read many people don't like Gamma which I've used before and I agree are hard and the felt wears away fast and seems like they bounce higher and are faster as they age. I've read a few good posts on the Penn and W Team balls but not many to persuade my choice Would permanent pressure balls be softer than pressureless balls? And would they last as long? What's your vote?