A popular first-time electric rc helicopter is the Pegasus dual rotor helicopter.

The first difference that you'll notice is that the Pegasus has two contra-rotating main rotors and no tail rotor.
The tail rotor on a conventional helicopter is used to act against the torque, which is a force that is generated by any spinning object eg the main rotors of a helicopter.
But with the Pegasus, the two main rotors spin in opposite directions to one another and so both rotors cancel out the other one's torque, which means that there is no tendency for the fuselage to want to spin round, so no tail rotor is needed at all.
The Pegasus comes ready to fly and features a realistic helicopter cockpit instead of the normal situation with most other rc helicopters, where the cockpit area is used to house the batteries or radio gear.
The motor is powered by a powerful rechargeable lithium-polymer battery pack which gives higher performance and longer flight times than other packs.

The Pegasus is a nice choice of helicopter for anyone looking to buy something a little bit unconventional, and it's an easy helicopter to fly with very stable flight characteristics - ideal if you've never handled a radio control helicopter before!
The Pegasus dual rotor rc helicopter is available from RC Discounts.
A complete review of the Megatech HouseFly, essentially the same model, can be read at RC Universe.