I like Jackalope's suggestion...Anything Garmin.
Funny inside baseball story.
As we entered into the Gulf War and men were being called up my marine store was being inundated by guys going east wanting a Micrologic GPS handheld unit. $2,400- would buy you one. They were the size of three brick phones and as simple to use as a Rubix cube.
Post the Gulf war we were approached by a company that produced airplane GPS units. They were failing due to Loran navigation, so they thought they would give the boating community a try before they went belly up.
They met with us and we thought we would give them a try so we highlighted their GPS units for boats. Well do in part to the price-point, ~$500- vs. Micrologic GPS at $1,800 at that time, and the ease at using the units (s) they took off.
By 1995, we could not keep the many models on the shelf. Garmin then became the #1 seller of GPS's for boaters. We were not only selling GPS units to boaters but vehicle drivers too. So they then went and expanded their line to cars and trucks, etc.
Then TomTom came out and Garmin expanded to backpacking, mountain biking, and a bunch of other markets/users.
So there you go...If my company would not have picked them up when they were on life support, Garmin would not be here today.