I have to recommend Nitro's. I know theyre expensive, but they ARE the best.
Last year i had several conversations with "MouthCaller", and after the first time i decided NOT to buy the Nitros. I realized i obviously still wasnt satisfied with my patterns, so after talking with him again, i finally listened, and ordered some H517's for my 835. I never believed it was possible to get a pattern as well as i got.
Im tellin ya man, you WILL NOT be dissappointed.