PolyScale (or whatever the brand is called) have an excellent reputation as far as hand brushing is concerned. This is supposed to be the ultimate hand brushing paint.
As a rule, water-based & acrylic paint (e.g. PolyScale, Tamiya) will give you the least headache. Also flat or matte colors are the easiest to handbrush, while high gloss varieties are, for all practical purposes, impossible.
Testors and ModelMaster are optimized for airbrushing, they'll always torment you if you try a handbrush.
Unless you want to accept building sub-standard models you've got to invest in an airbrush. Serious modelers use hand brushes for figure painting and touch-ups/weathering only.