Looking for info on getting a new Lowrance fishfinder

[Fish-N-Fool]

I'm interested in buying a new gps sonar side-imaging unit. The unit I currently have a Humminbird DI. SI.GPS 698 is by far the worst piece of crap fishfinder I have ever seen. The side-imaging is totally bogus as you can go by a log sticking out of the water 3 feet from the boat and the unit will not show anything. The GPS never works as it can't find the "BUILT IN" antenna.
This unit has never worked correctly and even though I have complained to humminbird about it many times they would do nothing about it. MY advise is never buy any products from them.
What I would like to get is the Lowrance with side imaging, gps chart-plotter, chirp, and the genesis mapping. What I need to know is what models on the lower end of the price scale have these features and is there any other items needed to do this. I would be interested in a used unit that had these features as well but not sure what to look for.
Also is there an official Lowrance forum?