I have been very happy with my PedalForce QS2. It's not as stiff in the BB as my Cervelo R3, but stiffness is overrated, and in any case it's not a noodle. It descends just as well as the R3. Or maybe better- I have been showing up on it at the regular group ride and a couple of the guys have commented on my increased descending speed. I think it's in my head and not due to the bike but who knows.

The first QS2 I got had a big blob of stuff in the head tube which prevented seating the fork. PF was good about sending me a replacement immediately- I think since I asked for a no-logo frame they accidentally sent me one off the reject pile. The replacement has been just fine. I have used it for some big rides- I did this year's Death Ride on it- and raced it. The frame is not why I am slow.

The only problem with it is that the tire clearance around the BB is very tight, so I have to run low profile 23mm tires. I don't know if their newer frames have the same problem but I expect not. The headset uses the Campy standard which is kind of hard to find. Their newer frames use a more common standard.

I would get either the new QS2 or the CG1, both with BB30. Those look pretty cool.

I am less enthused with the fork I got (an ID14). It's not that light and is flexy.