I went with this company since they are local to me:
http://westcoastriots.com/shop/autom...n-13547502445/
No dyno results, but given that all the mods put together complement each other, it makes the car just a bit more fun to drive. It's all subjective anyways, I have an S54 in my other car so my M54 ZHP won't feel as frantic as the S54 but it's fine for daily driving.
I don't have pulleys installed yet. Will probably go with Turner Motorsport or Rogue, whatever big name is available and will be on sale during the holiday/clearance season, highly doubt there is a noticeable difference between the big names.