Yes, Steve,  top-end EMTBs are for the maniacs who want to fly in the air on unridden 60deg mountain forest slopes. 
Matthew has an  AUD7k+ one, and likes the rough stuff, but does not do  the above.
I have a Bosch Cube bought secondhand locally, and Sue a Valk off the web.
These are sold a EMTB as they have better/bigger wheels and tyres, tougher frames, hydraulic disk brakes, suspension,  and better gear ratios. 
Ours are suitable for gravel-formed bush trails and disused railway tracks.
The 'cruiser' electric bikes are for bitumen town use. 

A bike rack on the car allows adventure exploring at other sites.
Not sure we'd be cycling mid-day in your current temperatures.   Send some heat this way - it is a very cold winter here this year.