So, I'm really not going to notice any improvement in video quality with a dedicated card over integrated? If so then sure I won't get one. Would intel's hd2000 integrated video (like on a 2120 motherboard) be ok?
Discrete video card does not affect video quality. It just works faster, and that faster is only needed for games. Intel HD 2000 and HD 3000 will be more than enough for EVERYTHING you do that isn't 3d modelling or gaming.
Furthermore, what is your budget? You said you were going for i3 2120, and what other components? Where are you from?