I think ill go with ZPermissions have only heard good things about itFrom personal experience.. I would use PermissionsEx or anything related to that such as ZPermissions ( Used by mineplex ) or BPermissions. There all very good permissions plugins. The think I like about them is that it doesn't take a long time to configure and you can edit the configuration in game. So lets say a player finds a permissions bug you can fix it in game rather than going to your configuration.
Banned forever. Reason: Selling "free" stuff and claiming it as yours
