Agree with @acanofcoke ; can't wait for it to arrive on Top Gear, but Top Gear haven't even done the Koenigsegg Agera :( the old CCX-R did it in about 1:17 or 16 I think.
Another "fact" : Koenigsegg claims a theoretical top speed of 280 MPH (yes that is MILES PER HOUR) or 450km/h though nothing has proven to beat Veyron's 431 km/h record yet... Still its 0-400km/h time is absolutely ridiculously and stupendously fast.
The CCX cars were much better looking than the Ageras.
I used to think the same thing. But now I think the Ageras look twice as good as the old CCX cars. I still think the Agera look nicer than One:1 but maybe it just takes time to get used to the new look of a koenigsegg... Will have to see.
As for One:1 vs P1... you are definitely wrong about it having nothing on the P1. the P1 is absolutely amazing, and is up there with the Koenigsegg Agera, Bugatti Veyron, Pagani Huayra etc, but the One:1 is a Veyron/Huayra killer ;)