Thanks for your input. Ultimately—with the exception of the front and rear derailleurs (Force components from my old bike)—all the components will likely be SRAM Red. As for the wheels, I went with a 1077g ZEN wheelset featuring Alpina Hyperlite spokes. My goal is to end up at around 6.8 kg for the complete, ride-ready bike—including pedals, bottle cages, and a Garmin mount. That is why I am looking for a handlebar in the 280–330g range.