The shop sets the prices, but I beleive that they are going to sell it for close if not the same price as the original. Now the Silver, that's a totally different subject and I can't answer that one.

CF is very light and the v1.5 addresses some hardware issues in that the stand-offs are shorter to minimize weight further. Don't know if it's any lighter then the stock, but it is very rigid, and that's what counts

BTW, the Silver has Nylon Stand-offs!!