All about what you like. I would also go with whatever your LHS stocks for parts. Better than waiting for a shipment or paying extra for express shipping.
The RTR looks nice I like the Blue Stamped chassis and shock towers.
For 700 with everything it comes with is amazing. I'm wondering what servos they will include with it.
I might get it just for the fact you get all the sides and then convert it to an E 2.0 since I already have my 2.0.