My Hummingbird "el-cheapo" depth sounder [circa 1988] finally died and it is time for a new one.Before I go buy another "el-cheapo" does anyone have any working knowledge of new features/technologies (other than an anchor alarm) that are practical on a saiboat that doesn't do any fishing? I looked around and find all kinds of new gee-whiz gizmos that you can get, but does anyone really use it? -- espcially on a saiboat that is screaming at 6 knots?Thanks for any advice.