The flagship AVIC-8100NEX isn't just the top of Pioneer's line, it's one of the best, most fully featured receivers on the market. Just make sure you're not buying more functionality than you really need.
Pioneer's flagship AVIC 8000NEX boasts dozens of media and navigation options -- including the first aftermarket appearance of Apple CarPlay -- but most users will find a better feature-to-cost balance lower in the brand's NEX lineup.
Rather than reinvent the wheel, Sony's newest all-in-one car audio receiver pairs a brilliant 7-inch display with GPS navigation powered by TomTom. The result is almost the best of both worlds, but we'd like to see a bit more integration.
Though a bit pricey, the iPaq Navigation System's strong reception and easy-to-read maps get you on the road to a smooth trip.