Save up the extra and get the 798. The screen is noticably bigger. You will kick yourself if you don't.
Dayton
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Might want to check screen size is 5" on 797C and 798C. It does have more pixels 640 X 480 on the 797 as compared to 640 X 640 on the 798.
Garminarmin gpsmap 1040 xs networked with Garmin gpsmap 1242 xsv , Panoptix PS 30 and PS 31. Livescope LVS 32
Ice rig Echomap Ultra 106SV with LVS 12 and GT10-IF
Save up the extra and get the 798. The screen is noticably bigger. You will kick yourself if you don't.
Dayton
Yep, the 798 is definetely bigger.