Pilgrim:
I stand corrected after reading Burnie's thoughts. If the English Channel that you plan to sail in is the one in Australia, rather than the one between GB and continental Europe, then it would make sense to get a 276.
Geez, I hope the engineers at Garmin who designed the 276 read this website. If they knew what fierce loyalty 276 users have to their product, they would make sure it is never taken out of production - you would still be able to buy a new one in the year 2025.
Michael