Pretty easy question for me really, I'd be more than happy to see them releasing things sub-only. The only reason I ever really need a dub is if I'm watching the movie with my younger brother (who hasn't got the attention to sit and read subs), or family in general, but other than that I rarely touch a dub.
Soundtracks as an extra are really the most important thing to me, especially knowing the types of works Anime Limited are picking up. Makoto Shinkai works for example have brilliant soundtracks that I really, really love, so stuff like that is very important to me. Artwork books and stuff are nice too, but the soundtracks are of more importance.