I generally use Jagwire stainless steel die-drawn derailleur cable and the LEX housing on my Shimano 6800. So far my mechanical 6800 has been almost flawless and has 25,000 miles on the groupset. I have a Ti frame with regular exposed cables which I happen to like better easier to change and maintain. My question is I see now Jagiwire was some pretty pricey super cable they call Pro Shift that sells of $31 for 2 cables and the housing. Anyone use this or find that the top of the line stuff really does shift better/ I don't wretch every day at a shop so someone who does might know the point of diminishing returns.