Everyone has way too many personal likes and dislikes to support any one. For many the top 2 are Humminbird and Lowrance in no specific order. Look at both. Look at options you want, options they offer, and the necessary components it takes to run the system (there are differences) and narrow it down to 1-2 of each brand and then bring your question back here.
Capt. Craig Copeland
2013 Nautic Star 2110 Shallow Bay Boat
Humminbird HELIX 12 CHIRP MEGA SI GPS G2N
Nautic Star Boats Pro Staff (nauticstarboats.com)
Redneck Fish'n Jigs Pro Staff (redneckfishn.com)