What is your experience level?
Where do you intend to fly?
What does your LHS stock on the shelf?
What is your budget like?

The answer to your question will depend on your answers to these questions.

Certainly the TRex SE is the top of the line as far as 450-class electric helicopters is concerned.
If you've never ever driven a car, would you want to learn how on a Ferrari?
Well, maybe you would, but would you be very successful?