There should be a final 5th volume to finish the series. As extras, I hope that they include the Pride of the X-Men episode. The Japanese anime openings would be great too.
I really like Chatmonchy. Great pop rock band.
Perfume is great! Even though they're an Idol group, their music and performances are a step above other Idol groups.
I've watched the first 2 episodes of the new dub. Halfway into the 3rd episode I switched to the Manga dub. The new dub is ok. The translation is much better but the voice acting kind of bland. I'll watch the rest of the new dub someday. But for me I'd stick with the japanese and the Manga dub.