Has anybody bought one of the Lowrance HDS units yet, and had it out to try it? In particular a model with the 83/200 khz transducer. I'm wanting some real world opinions on its performance. Any shallow water (6' to 30' range) issues like double echos, clutter, ect? Which GPS package is best for inland lakes and rivers with high detail? I am interested in one (HDS-5) but would like to talk to someone that has used one before I fork out $700.00+ for a unit I may not like. Thanks, WRB.