Totally agree with charlesn. If you buy a Lowrance be prepared to replace the transducer (more than once) they are the first thing to go. Customer service at Lowrance is horrible, ask anyone who has tried to contact them.
I have owned 3 Humminbird units for 5 years with no problems whatsoever. If anything were to go wrong, I like the fact that I could get help when needed. I really enjoy the quick release feature humminbird has instead of screwing in cables.