I have both the Presto dehydrator and the Nesco American Harvest FD-1040 Gardenmaster 1000-Watt Digital Food Dehydrator. I like them both but the Nesco is definitely better quality than the Presto (but also more expensive). The Nesco is easier to clean and I like that the fan and heating elements are on the top which prevents them from getting dripped on.
I have used the Nesco to make beef jerky from ground beef as well as fruit leather and dried lime and lemon.
The Excalibur's get great reviews but or more pricey. I have seen smaller less expensive Excalibur versions at Walmart.