Pacific Cycles Reach R20
Tyrell FSX

Weight: Under 9kg (<20lbs.)
Both easily on par with everything's that's been mentioned here, including the BF Pocket Rocket. They both look much better too.
I don't quite understand why a BF
PR would be faster than, say, my own Dash Altena or other competent frame if they were both set up the same way with comparable or identical components, ridden by the same pair of legs. BF magic pixie dust?