On-One / Planet X bikes and components

I had the Pro Carbon for many years and was very happy with it. Paid just under 1k in 2008 for part-Dura Ace equipped, stock PX wheels and kit, etc. which seemed reasonable at the time, so yes £749 for SRAM Rival 22 is excellent value IMO, and I would definitely have it on my short list if I was in the market for a road bike at <1k right now. As it is, I sold it in order to finance a PX London Road since I needed a more functional bike with clearances for wider tyres, rack mounts, etc. The Pro Carbon has old-school race bike clearances, i.e. 25c max, or 23c with skinny mudguards (Raceblades).

I've got a Planet X Pro Carbon, albeit a self-build rather than a Planet X build. It's reasonably light and comfortable, with fairly upright and relaxed geo. It's not the stiffest frame in the world, by a long chalk. If I give it the beans in a sprint I can feel the frame moving, and mine gets quite bad speed flutter at over 50mph, but keep it below 50mph and it behaves itself nicely.