+2 on what Nitro said. Very true.

Secondly, as a new guy, you should know that what a manufacturer claims on the box isn't always true. And, you'll note that little asterisk attached to the speed claim? That speed is only attainable with "optional gearing" and at least a 2S lipo, if not a 3S. And optional gearing is not meant for everyday running, unless you want to burn up your motor. A "no-touch" infra-red thermometer is a good thing to have for checking motor and ESC temps. You should get one.

Try to avoid getting "The Big Packages" that include a battery and charger, they're usually not worth the extra cost, as the charger is SLOW (usually 2 Amps max) and the battery is a low-capacity NiMh which shouldn't be used on brushless systems anyway. OK, I suppose, if you're just testing the waters, not sure if you're really into it. But if you do stick with it, you'll want a better charger. http://www.hobbypartz.com/73p-ac680-accharger.html

And realize, too, "waterproof" ISN'T. It does not mean you can submerge the whole truck, or run it thru puddles and mud, or snow, without the potential for damage. Especially if you get it wet, and just let it sit. Stuff rusts! And yes, while there ARE guys out there who have waterproofed their trucks and do run them thru DEEP puddles, they have gone the extra mile and added their own waterproofing, by either putting stuff in balloons, or using Plasti-Dip to seal cases on ESCs and servos. Even still, a THOROUGH cleaning is required after such severe activity.

You could start out with the Slash EXL 2wd (brushed version) cheaper, as you learn to drive an RC. Then once you get the hang of it and want more power, just replace the motor system with a VXL (brushless) one later, it's easy. But if you have the dough, brushless and lipo is the way to go.