Yet here I sit after fresh-installing AMD's Catalst 12.3 driver, from 6 months ago, and newer drivers make my system not work right.
If there is truly a need to update a driver other than what is offered by the driver disc, Windows will offer it for you. There is always the chance that the driver provided by a board makers has been customized due to a custom layout, or some other implementation reason, that makes getting drivers from a part maker, like a LAN or Audio chip, not always the best idea.
If you are having problems, then yes, looking for an updated version is a good idea, but if htere are no issues, there is no reason to update. Things like drivers interfering with each other can be common, and might not be tested for by the actual part maker, but have been tested by a board maker.