i ran both a Lowrance and a Bird in '07, then i switched completely to Humminbird in '08 and haven't looked back since. as Todd mentioned, they just plain work the way they should without messing around with multiple software "fixes" through the season.

most features are pretty comparable: awesome sonar detail, run the maps that you need, etc.
i prefer the Humminbird's screen resolution, map display options, and lower price.
i like the Lowrance's 4-way screen and ability to repeat icons.

there's a Humminbird 798 Side-Imaging unit in the Operation Muskie auction. you'd probably be able to get it for a smoking deal...
http://www.operationmuskie.com/OM%20...read.php?t=196