My new kid's book is coming out next month and the reclusive latelate will be traveling around to promote it. I'm a nervous, even panicky driver when it comes to freeways and unknown towns and cities. It's the combination of navigating speedy traffic and reading signs that does me in. Since I can't often have a actual navigator/handholder with me, I think I ought to outfit my old Camry with a portable GPS. Looks my choices are Garmin or Magellan. I want a helpful voice telling me when my turn is coming up (if at all possible a VERY comforting voice, Gregory Peck would be nice...)

Can any of my TE sisters recommend one over the other? Thanks