Originally Posted by TomP.
I do not think you are figuring this exactly as 1028 X 600 pixels is per square inch not for the entire screen. For total pxiels you have to multiply 1028 X 600 X width X height for total pixels.
that was what I was thinking. they all have the same pixels per square inch. they should get the same quality picture.
depending on your budget and room would decide which unit I got. the larger screen gives more detail and time on screen. I have an old 10" lowrance on my erie boat. then I have a helix 7 on my little boat. the 7 is a great little unit, but its little. if I used it a lot I would get a bigger unit as soon as it was in my budget. get the 9" with si. I have di and think its pretty much a waste of good money. if you can get a bigger screen with si and its in your budget and you have room go for it.
when you decide come back and let us know what you got?