A little clarification on these inks I thought could help. Some of you already know this, but some people don't.
Matsui Bright discharge white is for low mesh, and has a very heavy pigment load. This will give you really bright whites, but is suppose to be run through lower mesh counts. HM discharge white is for higher mesh counts (hm). This does not have as much pigment as the bright white, but it will give you a softer hand feel.
Brite discharge base, is a base that has tiny brightners mixed in with it which is why it is not as clear as HM base in the budget. The idea of the brite is to enhance the colors when mixing. The hm discharge base has no optical brightners in it so it will be a bit softer and print through higher meshes.