All the above recommendations are on point. Theres alot of great options these days. Whichever route you take, try to get a unit that is bundled with a Navionics+ card so you can save some money on the mapping software you will just end up buying down the road anyways.
The Garmin LakeVu G3 maps that come with the 93sv are pretty dang good. Also note 1) Garmin owns Navionics now, so you don't need a Navionics card for a Garmin - they won't work anyway. HB will run either Navionics or LakeMaster. I put a Navionics+ in my 'bird - already had it from a bundle Lowrance Hook2 I am selling.