James,
The "best" paints are the ones that you get the best results from.
However, to know that, you will have to "put brush to bottle," so to speak.
As mentioned by Paul, the two main and most common classes are hobby enamels and acrylics. Each requires different thinners and techniques. Another consideration is whether you'll be airbrushing or hand brushing. Some paints are better suited for one application method and not for both - in fact, many hobby paint brands have specific lines formulated just for airbrushing or hand brushing.
Most model builders (with a fair degree of experience) are like Matt, and use several different types and brands for different purposes.
I use Tamiya acrylics mostly for airbrushing and Vallejos for hand brushing. However, I also use Polly Scale, Model Master, Citadel (Games Workshop), Reaper and Floquil brand hobby paints for many different applications. Sometimes my choice is based on nothing more than a particular color. If that's not enough, I use Grumbacher and Windsor&Newton oil paints and a couple of different "craft" acrylic paints.
There is, IMO, no one single "best" paint for all purposes.
Based only on your single post, I imagine that you're probably intending to hand brush your model. You can get good results with either a hobby enamel or acrylic. The only brand that I would not recommend is Tamiya since in my experience, they really have to be applied by airbrush.
Other than that, as long as you have the right kinds of brushes and thinners, you should be able to achieve satifactory reseults with any brand of hobby paint that you can find locally. So, I would recommend that you just shop around the local hobby shops and see what's available. Select either an enamel or acrylic brand, get the correct thinners, and some decent brushes and "have at it."
Learn and develop your painting technique first since that makes much more difference to the final results than the particular brand of paint. However, once you do have a brand and type of paint, you can get some specific tips here for using those paints.
Finally, don't be discouraged with your first efforts if they don't come out perfect. Keep at at it and learn.