Garmin StreetPilot. I’ve actually had both the Garmin StreetPilot and Garmin NUVI – one for each of my cars. The NUVI is a lot smaller and slicker looking but it died and I returned it to Costco. The StreetPilot is clunky looking but it’s very easy to use and it’s been going strong for 3 years. Now I’ve downsized to one car so I only need one GPS anyway – the StreetPilot – it’s great. I recommend investing a few extra $ and getting a friction mount for it since you can put the whole assembly away in your glove box (if you have a large enough glove box) and leave no trace of a theft target for car prowlers. The suction mounts leave a ring on the windshield that is a dead giveaway to theives.
