Here is my list of preferred Vallejo paints. Most of these have GW equivalents. They come in dropper form which gives a lot more control and prevents drying in the pot.
This is a solid list that will provide almost every basic contingence plus some fun colors like foul green and hot orange.
Here's a good place online that sells them: http://www.thewarstore.com/vallejomodelcolors.html
For a Utah Valley local I recommend a local shop: Blakfyre Games in Pleasant Grove.
Dark Prussian blue
Russian uniform green
Camo olive green
German black brown