http://explore.garmin.com/en-US/marine2016/
http://www.panbo.com/archives/2015/11/garmin_2016_quickdraw_sonar_charting_smaller_panoptix_striker_and_lots_of_chirp.html
if your considering GARMIN check out the new value line and the addition of full chirp to more units including echomaps and the new value orientated line. Also a smaller version of panoptix.
Also, Quickdraw Contour sonar charting to many units.