DW recently posted this video with Tony Royster Jr playing a Performance Series kit.
http://www.youtube.com/watch?v=uCZ_TLNchvM
Wow, in my opinion those sound awful. I'd not have posted those if I were DW.
That being said, I saw a kit in GC and it sounded good in spite of the tuning. As expected, a kit in GC was very poorly tuned.
While I think these are a good buy if you NEED to get a DW, I don't think they top comparable offerings by Tama, Yamaha, or Mapex in terms of quality. I can't comment on Pearl's offerings as I don't know the line very well.