WELCOME to the hobby
From what I have heard the HPI Drift kits are the cheapest. Considering almost every hobby store carries HPI parts it would be a wise decision. Bang for the buck would be picking up a used one that was barely used or is in good shape at least. But if your goal is for new then stick with it.
Yokomo also offers a drifter and I've heard its just as good as the HPI if not better but parts will be your #1 problem as Yokomo is no longer around.
The good part about the HPI drifter is the fact that it starts you off on a basic platform to learn RC engineering and how things work ... it also has an endless amount of aftermarket upgrades so you can upgrade the car as you please along the way to make it bettering in all aspects.
Drifting is fun especially when you add the nice bodies and light kits everywhere.
I've seen some cool drifter RC cars around. Good luck w/your search!
Jay