I have an Aventon Pace 500, class 3. I have over 750 miles on it and it is very powerful and also comfortable. I am very happy with the purchase. Aventon is a reputable company. I mostly ride rail trails and sometimes on the street. The company came out this year with the Aventon L, which is an upgrade. It has a larger battery For longer distance, fenders and a rack and also front suspension and hydropic disk brakes. That bike is only $1,599. with free shipping. If you buy it through a bike shop that sells Aventon, they will assemble it free of charge. The tires are 27.5 x 2.2.
There are other good companies out there that sell excellent bikes for under $2,000. Keep researching on this site and ask questions because the people here are extremely helpful. You must take into consideration that there is no such thing as a perfect bike. Good luck.