I just started dabbling in watercolor last spring. I had the same line of thinking as Tinkertrain, not wanting to spend too much money on a medium I was going to try out. In my case I looked at what retails here at what prices. For instance the cotman set is for sale in a shop that charges waaay too much.
So I found an art supply store that sells amongst other brands products from White Nights. I decided to get their 24 color full pan student grade, Sonnet.
I am reasonably happy with it. Good pigmentation, rewets easily, I think it behaves well on the paper ( disclaimer, I have no personal experience with more expensive artist quality paints). Most colors are good single pigment paints.
There are some downsides; a couple of colors are fugitive, the two violets and the one orange are worst, I don't use them (because, you know my work should be preserved for coming generations
).
Also a couple of unnecessary double pigments ( the sap green, and green hued blue are mixes from pigments, that are in the set as single pigments, supposed to be convenient I guess).
So all in all I think Sonnet has a great price/quality ratio for beginners like me. A good selection of colors to find out what you like.
That said I do plan to upgrade to artist grade, most likely in phases, starting with better options for the more fugative paints.