Humminbird all the way, So easy to use. The Si is great for finding deep cover, you can cover 100 ft off each side of the boat in one pass. See something you like mark it with your gps and go back over top of it with your Down scan or sonar to see what it was and if its holding fish. I use it a lot in the summer. I know Universal Mania had the 998 Si combo cheaper than the 898 si combo so shop around before you buy.