Hendi:

I've used over a dozen different GPS units for motorcycle riding over the past 15 years (I used to beta-test them for Garmin). If you are generally happy with what you have now, I can only think of two possible reasons why you might want to buy a new unit:

1) To get better cartography and/or directions. Newer Garmin units use maps that are compiled in a different format than what is used by your 76. These maps are updated 4 times a year, free of charge, and contain many additional road attributes that your 76 cannot take advantage of, such as lane restrictions, medians, speed limits, the ability to support 'lane guidance' during routing, etc.

You may or may not find the additional data - and more precise directions that the additional data enables, such as voice messages like "Turn left at the traffic light" or "Turn right at the Mobil service station" to be useful.

2) To take advantage of new features such as traffic, weather, etc. I'm just finishing a 7,000 mile coast to coast and back tour. The GPS device I have now (a Zumo 590) delivers live weather radar for North America. I didn't think much of this feature before this trip, but after having used it to dodge thunderstorms - and stay dry - during a particularly rainy week going across the prairies, I now consider live weather radar to be indispensable.

Really, though, the decision ought to be based on how far away from home you are going, what kind of riding you are doing (on or off road), and how much value you attach to the newer features available (phone support, live weather radar, live traffic information, 'up ahead' features, and so forth). A 'feature' is not a benefit unless you make use of it.

Michael