Looking for a new portable navigation system? Many drivers are fine with the usual 3.5-inch and 4.3-inch units currently on the market (and that are selling for rapidly decreasing prices these days). But if you want to kick it up a notch, PC Magazine has a roundup of five of the latest big-screen models, including a 7-inch behemoth from Garmin.

The roundup features reviews of the aforementioned Garmin Streetpilot 7200, the 5.2-inch Garmin nüvi 5000 and Magellan Maestro 5310 I covered recently, and two more units: the marine-navigation-focused Lowrance iWAY 600C, and the Cobra Nav ONE 5000, which features an extensive traffic camera database for avoiding tickets. Check out the full roundup, complete with individual reviews, at PCMag.com.