I've got a Garmin 160 blue FF that works well. Never any problem. Handheld Garmin GPS works fine as well.
Icom 402S VHF.
I'd go with a decent VHF if I were you and pick up a inexpensive Handheld GPS. I'm not a fan of mapping databases in handhelds, screen is just too small. I rarely use my map. I use it for waypoints, speed, etc. The basic functions of any handheld. Garmin makes a "Gecko" model. The cheapest model is $100.00 and it does all the basic stuff. For a tight wallet, I like it. I haven't used it but I've looked at it in stores.

Going with down speed this year but only after a lot of catching fish without it.

Bottom line....... spend you recourses on the safety of a good VHF and Antenna.

Mike