Bigstick is right; you can pick up Miyazaki bargains from those sites, particularly DDDHouse.com.
I bought Spirited Away from there and it seems to be a top quality release - excellent picture and sound (DTS) and official too since it's filled with Buena Vista/Disney leaflets and booklets (the case has a Mickey Mouse hologram sticker as well).
However, the extras disc is not subtitled in English - the Making Of documentary, including interviews with Miyazaki, is in Chinese with Chinese subs!
I was heartbroken since the set is otherwise exquisite.
That's why I'm waiting for the R1s, particularly Laputa (even though it's just called Castle in the Sky).
Nevertheless, if you just want the film, these R3s are fantastic.