The 41.09 are the latest version at Nvidia`s site,however they`re still waiting for WHQL approval by Microsoft(just means for Microsoft to test and officially approve them).
The last WHQL drivers are the 40.72 drivers,some people prefer the older 30.82 drivers etc,there`s no right or wrong driver,I normally stick with official WHQL drivers so am using the 40.72 drivers at the moment.
Gaming wise it`s trial and error but in general I normally don`t get any problems with any Nvidia drivers but then I don`t use beta drivers.