You can spend the money and get a good radio like the 9c or 9303 or you can get a DX7 and get everything you need to fly that heli, don't get less than a 7 channel radio because at some point you will want an rpm governor and if you only get a 6 channel radio you will be out of luck.
http://www.rcuniverse.com/magazine/a...article_id=836 is a review of the Titan with some build tips.
I'd reccomend the 401/9254 gyro/servo combo and 3 9252 servos, the throttle servo can be whatever is handy a 3151 is cheap and works great.
An OS 50 hyper engine with an Align pipe is also a great and reliable combo
Good luck and welcome to the heli forums!