This Furuno does not support radar so you will need a new chartplotter that does. If you are near a Grady dealer I'm sure they will be happy to discuss this with you. West Marine also has a good selection of electronics that you can view and play with. It's important that you get to know the units so you can make the best decison on ease of use, size, buttons vs touch screen, features like blue tooth, etc. Once you make your choice, than shop arond for best deal.
I like Garmin for it's ease of use and simple install. Others are just as fond of Lowrance, Raymarine, etc.
Good luck.