HMR said:
What makes the 276C and the 60Cx special is that they not only can store one huge track log, they can also store a library of different tracks with individual names and colors.
A good point.
One of the trends I have observed taking place in GPSR user interface design is the 'simplification' of the user interface. 3 or 4 years ago, GPSRs were something that was purchased by the 'techie' crowd, the early adopters, and the UI was quite functional, in the sense that it was designed by engineers.
In the last two years, GPSRs have become more of a mainstream product (heck, it seems that the majority of vehicles on the road in Netherlands have one installed), and the manufacturers have put a lot of effort into streamlining the UI so that it doesn't take 100 hours of study to become familiar with all the different features, and how to change configuration of the GPSR. This simplification has been beneficial to the new wave of users, who are more 'mainstream' than 'early adopter', but has resulted in some loss of functionality for the 'keeners'.
The SP 26xx series was the last pure automotive GPSR that offered the user almost unlimited control over device configuration. Or, to express that same thought the other way around, the 27xx was the first GPSR that you could give to your parent to use without having to spend a lot of time explaining how to find things within the menu structure.
The GPSRs that primarily serve the marine and aviation markets (2x6, 3x6) have not been given a simplified UI because it is assumed that mariners and pilots want the ability to configure the device for various specific purposes. So, the more your navigation needs differ from mainstream 'on road' use, the more attractive the marine and aviation units become. A pure automotive unit such as a SP (any generation) would be next to useless for a long off road trip, in much the same way that a primarily marine unit such as a 2x6 or 3x6 would be overly complex for a rider who does not plan to spend very much time off the public road system.
It's easy for long time users such as myself or HMR to spot these trends, because we can draw on our personal experience with earlier models to see how things are evolving. It is a much more difficult task for a first time purchaser to make an educated decision concerning purchase of a 'specialty' GPSR (a primarily marine or primarily aviation unit) for off road use, because the baseline - as set by the newer automotive units - is shifting all the time.
Michael