I've got an older model Nesco/American Harvest similar to this:
Good info. Thanks!
Mine only goes to 145 while the newer models go to 160 which is better/safer for meats/jerky. They typically come with fruit roll-up trays and clean-a-screen which make them easy to clean. And they are expandable. I don't know if they're the best option for you, but mine has lasted nearly 30 years.
Not sure how true it is, but I've heard the round ones dry more uniformly, while the square/rectangle ones are easier to load/utilize space.