Spirithorse is definitely more experienced in Parelli than I am and will be for a long time
But I personally found the Success Series the BEST ever! I still watch them sooooo often and I always find something new in them to try. For the Holiday season they have the On-line Kit with a halter, rope, and other stuff in it. Defiantely worth the money.
Also, I found that joining the Savvy Club was worth the money. You get either a DVD or Magizine every month....I am defiantely finding this months (or the last DVD that I got...not sure what month it was) especially interesting and just downright great. You also get access to lots of articles, videos, and so much more.
If you have any questions, feel free to send me a PM, I'll try to be as helpful as I can, but I must say that Spirithorse will probably be more helpful