Everyone around here chooses DunlopHDHardCourtXFelts if they have a choice.
Lasts 4 sets. The heaviest, knappiest, slowest moving, ball around, but you can hit full out and actually maintain a rally.
Wilsons are good for one hit rallys, and last 7 games.
Penns last double that, and you can hit two shots per rally.
Dunlops, most rallys can last 5 shots, everyone going for winners (and playing well).