Okay, here's the confusion. Most people will point you to a certain kit they feel is the best for new vapers, and certainly the Riva is a pretty damn nice kit to start with.
However, the bottom line is that there is no such thing as the one kit to rule them all, and a lot of personal preference can go into getting one, even as a new vaper. What you do want, tho, is a certain key features.
1 - A fat battery. By that, I mean any eGo/Riva type device with 600 mAh or more. The mAh (milliamp hours) is a meassure of how big a charge the battery can hold. The higher the mAh, the longer it will operate between recharges, and also the longer the lifespan of the battery will be. (most are rated for a minimum lifespan of 300 charge cycles)
2 - An easy to use atomization device. The king in ease of use is the tank atomizer, so any new vaper should, IMHO, start with those. Cartomizers are not that hard to use, mind you, but they take more fiddling and some mechanical inclination.
3 - Make sure it is a 510/eGo or 901/808-D device. Why? because eventually you WILL want to try other atties, cartos and tanks. In fact, you will have to. Atomizers of any kind are semi disposable, and whatever atties your first kit comes with will need to be replaced around the 2 month mark. This means you want something that will be compatible with most atomizers and cartos in the market, not just a kit that is only compatible with its own parts.
So, in other words, I would recommend you get any other 510/eGo fat battery kit currently available in LF. Personally, I am gearing up to buying a Firefly tank kit soon, since I have been hearing great things about it.