Well, that's fair enough, I suppose. Plus, if you read the manga, you get boobies! Bonus! Oh, and also more gore.
I suppose it is a little unfair to compare the Anime artwork to the manga artwork. It's just... I mean, for example, I own a few Dragonball and Dragonball Z manga chapters. They redid them into comic book size form at the time. Anyway, the point is, the artwork in those is excellent and perfectly matches whatever the art style was in the series at the time. Or, I should say, the animators took the trouble to perfectly match Toriyama's evolving art style.
Then, if you see the InuYasha anime first, as most people would have, the manga art style is almost completely different, and of a lesser quality. It was disappointing to me. Maybe I would feel the same way about the Anime if I read the manga first... I'm not sure. And yeah, I can't really vouch for later chapters, either. I think the latest ones I have are the ones with Kagura's first appearance. InuYasha's Windscar blows her top off, but in the manga, you get more than what the anime gives you, hahahahaha.
Yeah, manga does lack voices. I tend to hear the voice actors' voices in my head when I read it.
I suppose if its something that doesn't have an anime yet, or won't get one, or I haven't seen it, or whatever... I kinda' have to imagine the voices, I guess. 