@Tonepoet not like the DVDs were a bad thing. Black Cat each volume had a reversible cover so for a typical ~24 episode series you'd get ~6 unique artworks. 12 if they were reversible and there were some nice extras on the DVDs, like with Trinity Blood you get a Tarot Card Set. also if you go by what
@ToshinouKyouko's link talks about you don't have to worry about a sudden change in quality