I have a Tire Minder TM-77 TPMS which works well. Has a repeater in the rear battery bay, and I have sensors on all tires on the road (coach, dolly and toad.)
I use the Good Sam GPS made by Rand Macnally and it is reasonable. It has flaws but they all do.
Another item you didn't mention is a dash cam. I recommend getting one, and the Garmin 45 camera is good. It has a lot of features (including a GPS, lane watching, collision alert, etc.) above and beyond the recording of your trip. My biggest accident worry is some jerk doing a brake check on me figuring I have money and will pay for him to get a new car.
My name is Peter, and I'm never going to grow up.
- Winnebago Era 2010 Class B
- Holiday Rambler 2006 Ambassador 40-DFD Class A