The_dude8,
there're two types of CRT tubes: aperture grill, and shadow mask. The former is for all those trinitron/diamontrons, the latter is for the rest of those. aperture grill is supposed to be brighter, while shadow masks produces crispier text. however, until recently, only the "trons" were flat, but they have two very thin but still visible horizonal lines across the screen which may or may not annoy you. so shadow mask is not necessarily "good" or "bad". it's just that the only 19" in perfect flat monitor using it that can do 1600x1200 at @85 seems to be Samsung 900IFT (IFT stands for infinite flat tube or sth), and I haven't seen it with my eyes.