While you're at it, get some good quality squaredrive bits as well.
Even the SD tip will mess up the stainless screw head if it slips or
cams out. I found that the stainless heads fit the bits very snugly and
would leave the tip in the screwhead since I was only using a magnetic
holder for the bit.

Andy wrote:
Square-Drive it is, then! Thanks all!

Another vote for square - far superior in my experience.
Andy