With love and appreciation, I have slightly modified Mr. Brown's excellent gear calculator resource to be an "inline" javascript page with options/defaults more aimed to road bikes with double and triple chainrings.
The first preset shows my current road bike setup (compact double standard madone front ring; custom SRAM larger 10-gear rear cassette (ordered stock part that my bike store simply replaced the stock cassette with!) selected and charted below. You can click between my old bike (triple) and new bike (double) to see how similar my old and new bike ranges are. Yay -- a double that can climb so close to a triple!)
misc
~800g++ for rudy rockshox (1226g for "ultimate") -vs- grizl carbon fork = 430g
Sheldon "Gain Ratio" Brown