When I changed to C bars, I had to replace the top front brake line, so I went for it and changed them all to Spiegler braided lines. The Spiegler people were great to deal with and the product is 1st class.
BTW, the Spiegler website asks customers to go to their local dealer. I tried calling mine twice (a Triumph dealer in Suffern, NY) -- both times the guy on the other end said he was too busy to talk and would I call back later. The next call I made was to Spiegler direct.