Waiteman, all Garmin mapping units whether handheld or fixed mount have the same basic world map, sure your screen is a little bigger but the 76 hold 8 megs of download compared to your 2.5 and is an all-around more versatile unit. If I was going to recommend a fixed mount I would say, step up to the 182 ($675 + $150 for Blue Chip) or the 176/176c, the 176 run $499 + chip and is only slightly smaller then the 162 and can also be used as a large handheld. 100 bucks more you can get a color 176.