Someone needed my Garmin more than I did and I haven't replaced it yet. I now use a Holux GR-213 that I bought on E-bay for $28 with my PC. I have Sea Clear 2 and Chart Navigator Light. The Chart Navigator came with a Maptech chart set I bought for the Bahamas. The Sea Clear is a free download and uses the NOAA charts. I have been using them for about four years and have had no problems at all. It's a little tricky to get the NOAA charts into Sea Clear but once you overcome that hurdle it's a piece of cake.
If you have a computer with Bluetooth capability Holux makes units that can talk to it wireless.
The only problem I have is using a computer as a display. The marine environment isn't very friendly to electronics and we keep the computer under a plastic cover. Next season I'll get a marine unit, probably a MFD, and install it at the wheel where I can see it all the time. Otherwise, it's fine.
On the hard in Florida