bigger screen by all means. I have a 596c HD DI and it is sweet but the screen is too small for my old eyes to see it in DI but the sonar screen is OK though.. If I could of afford it I would of gooten the side unit.. It burns me to spend the kind of money we do for this stuff and your dam cell phone has a better VGA (video graphics accelerator) then your 1K + fish finder and color lcd screens have been out for decades now so there is no big new tec thing going on there..