It all depends on how much time and energy you have to configure and maintain your system. If you want a rolling distribution and don't have much time available, I would recommend Tumbleweed because it strikes a good balance between constant updates and operational stability, as it comes configured with snapper, a great tool for restoring the system in case of an update failure. If you have more time available to manage your system, I would try Arch directly because I am not in favour of using distributions that do not have control over their own repositories.