Congratulations and good luck with your new boat.
I've got the Garmin GPSMAP 489 on e-bay for about $500. Its a combo fish finder and GPS and it works great. Unfortunately they discontinued it right after I bot it. :roll: I mounted it in the electronics box on the console (sorry no pic).
I also have a icom ic-m422 vhf radio and Furuno 1623 radar I mounted up high in the t-top.