I just bought my first new ebike. Scott ESUB Tour with 250 Bosch Active Line motor & 400ah battery.
Pretty cool actually & (maybe importantly for some) road legal here.

Without the motor it rides like a traditional 3 speed Roadster & weighing just over 50lbs it can be carried upstairs if absolutely necessary.

I do believe that a Bosch central drive is a good place to start with ebikes & I'll add my feedback/experiences with this machine if there is any interest hereabouts.

I think Scott is currently promoting sales in US (Check = Electric Bike Review) so they may well be more common your side of the pond before long. This link shows my bike in its USA configuration being reviwed.

Pretty cool for an entry level quality ebike IMHO.
I paid $1400 for mine as an ex demonstrator. Looks like $3k+ on your side of the water!