If you get the carbon fiber blades, be aware that the harder blade means another part in the heli is more likely to break. Also, carbon fiber blades are fairly safe when the are whole. But if they are damaged (ie cracked, chipped...) get rid of them. At that point they are more likely to hurt you. The carbon fiber can splinter and do you some painfull damage. I would put on some eye protection when getting near the heli incase you have a glitch. Not to scare you away, just be knowledgeable about them. Again when they are whole and undamaged they are fairly safe. But if they are bad don't risk it.

I would run a 1100 3s lipo battery and get like a 9t pinion for the motor. That usually seems like a good setup. Just be sure to educate yourself on the proper care of Lip (Lithium Poylemer) batterys. You cant treat them like other batterys.