If rock-solid stability is your No. 1 priority, you should steer clear of beta software as a general rule of thumb. In this case, it might actually help to install the drivers. According to AMD, Catalyst 12.11 resolves a few annoying issues, including an application crash issue in Medal of Honor: Warfighter when running multiple graphics cards in a CrossFire configuration.
Driver updates don't come as frequently from AMD these days. The chip designer ditched its monthly update schedule several months back and said it would update drivers "when it makes sense."