i am definatly in agreement.....i have the trex 450
my set up is
the DX6i(raido)
logictech 2100t gyro with hs -81 tail servo....in case you dont know what a gyro it is a divice that corrects the tail for ex..if the tail starts to move jerky to the left of right the gyro will move the servo arm so it dosnt spin out of control.
align 430l motor with 35 amp speed controler
3 hs-65 servos...a servo move the head direction so you can control the heli
zippy 2200mah batteries you can get at hobby city.com

go to your local hobby shop they will help you out aton...aton!!
Your EXI is going to be around 500-600 bucks but it it totally worth it