Yes Dave, set your camera to 3648 x 2736
After you have tweaked the image in the computer to your liking keep the original large scale image for websites, printing, etc, but make a copy of about 800 pixels wide for posting in here.
If you want to show your image in large scale, put it into a website and supply a link to it in your post.
That way people can choose to look at the attached 800 wide image in here and/or go see the large original version via the link.
