You won't go wrong with either a Cube or Trek.
Evans now lists dozens of ebikes, none of which they hill have in stock or even easy access to.
Their own brand Lithium bike is worth a look, it has the Shimano Steps crank drive, which is very similar to the Bosch drive you will find on Cubes.
Not badly priced at £2K, but you may be able to get a Cube for a bit less.
More important will be the style of bike you prefer and the fit of it.
https://www.evanscycles.com/pinnacle-lithium-ion-2017-electric-bike-EV267144