I am thinking about getting an E-bike to being able to take Deja deeper into the hills (mostly gravel roads) without me getting exhausted or having to walk uphill with a bike. I also like to use that bike to bike to town over hilly but asphalt pavement, about 5 miles so I don't arrive at appointments in a sweat and a red face. I have been studying them on Youtube. Any recommendations (front, center or rear wheel power), experiences? Thanks!