I use Vallejo Game Color, Model Color and Panzer Aces series of paints. I have found that you can thin them down to 5-6 parts water to 1 part paint without the pigment separating from the medium, which is very nice if you use glazes. I use a few of the citadel washes and the new line seems to be just as good as the old one. As for a brush, a Kolinsky sable size 1 (it will have the same tip size as a size 0, but with a bigger belly) will cost you around $15. As you may have read, most people use the Winsor and Newton 7 series, but Raphael makes a good one as well. If you do get a nice brush be sure to get some brush cleaner as a kolinsky sable brush that is properly cared for will last a very long time.