I just finished putting together my fixed gear on a Low Pursuit frame. The frame is made of aluminum, wheels are carbon, and the altogether the bike is super light. It has found a perfect home in the city of Detroit, one of the most exciting places to ride.
Along with the Low frame, I added a "Royal Flush" crank from Paul Components. The Cinelli Mash bullhorns work well with the Thompson elite stem. The seat post is a Miche, and I put a Fizik Arione saddle to combat all the bumps from the unfilled pot holes in the streets of the city. The wheels are a carbon fiber set that I ordered from overseas, with the rear dish measuring 88mm.