Do I need an impact-rated ratcheting screwdriver?

Only if you intend to use the bits in a powered impact driver. The impact rating refers to the bits' torsion zones, not the ratchet itself. For purely hand-driven use, a standard (non-impact) multi-bit driver like the Klein 32305 or Megapro works fine; for tradespeople who swap bits between hand driver and impact gun, the impact-rated Klein 32315HD or 32500HDRT KNECT is the safer choice.