I bought the Syma S 107 first also. Truely great helicopter and easy to fly. Just wish it was RF and not infra red. Would love to use it outside on a bright sunny day.
My second is a single rotor Double Horse 9100. Flew it for about a minute and a half before I hit the roof of my daughters house and broke the main rotor housing. New one came in the mail yesterday. It is amazing that you can buy the whole helicopter for about $60 but a small piece of plastic costs $13. There is definately a learning curve when tranferring from a double to a single rotor and in my case two to three channel.
These sure are fun.
Gary