Get the biggest screen you can
When it comes to cahrt plotters, I'm of the opinion that you should get the biggest screen that you can afford and is practical for your application. I really like the Garmin units and thin kthey offer the best value. I looked at the 276C and thought it was too small to see the screen when pitching about. With that in mind, I recently got a Garmin 192C with an internal antenna. This is the successor to the 182C with a has slightly different keypad, a much brighter sun-light viewable screen, and a built-in bluechart basemap. So far I am very, very happy with it. The 198C adds a fishfinder. I think with a 36 foot boat you could mount it to your pedistal. The bracket isn't quite as convenient as a 276C, but I do take mine off after each use and it is very easy. Two minor niggles are that the standard bracket does not allow it to swivel side-to-side (like the 276C or a 172C), and you have to buy a power/data cable to run it at home with a PC - no battery power. The features are extensive, fairly intuitive to use, flexible and very customizable. The screen is very bright, crisp, and visible in all lighting. I can flip between different pages and functions very quickly almost without having to look. The map display even has a "night mode" with a different color scheme to help preserve night vision - it works. It has been very accurate and usually locks onto 6 or 7 satellites. After a minute or two of warm-up, my accuracy is tyically 15-25 feet. When you are ready to buy, check out www.gpsdiscount.com. I found then had the best prices. Good luck!Brad