You don't need us to tell you that phones are posing a huge threat to the dedicated navigation device market, but Garmin isn't giving up without a fight (or without hedging its bets). It just announced its nüvi 2400 series of "large format" PNDs, with 5-inch screens and a wealth of features. Standouts include voice control and some serious routing capabilities based on "trafficTrends" and "myTrends," which are exactly what they sound like. Prices start at $250, with all the features available but for-pay traffic and map updates. At the $350 mark you can get lifetime map and traffic. The whole line should be out
