Need Heater Recommendations

I've been using an Aquarium Pharmaceuticals Basic Rena 100 watt heater
for my 20 gal tank for over a year. I have 2 of them, but I've grown
tired of the lousy inaccurate temperature settings on the knob and no
longer want to set temperatures by trial and error. One of them can't go
lower than 76F.

So my question is what's considered the best accurate, quality heater
for my tank. I've heard about Ebo Jager and one called Visitherm or
something. They're both about the same price. Which is better?