If the 997c SI is a bit too pricey you might look into the 797c2 SI. I just put a 797 on my boat a few days ago and I'm real happy with it so far. The screen seems small after looking at a 997 but it will do most everything the 997 will and actually has more vertical pixels than the 997. I'm still using my Map 76 for my GPS so I don't have to devote any of the screen on the 797 to GPS. I haven't had much chance to go exploring with the Side Imagine feature yet but from what I've seen so far it's going to be a very useful tool.