I have the blade 400 and have flown tail driven helis like the CP pro. I would say that the 400 is way better. It is more stable due to the size and a lot cheaper to fix. The rotors for a Balde 400 are $12 and the CP pro are $17!! What is that about.
Anyway I get about 7 minutes of flight time. You can put a different pinion on it, but why? The thing is so stable with the higher head speeds. With the stock battery you can go about 6 minutes and with a larger battery you can get 8 with sport flying. If you don't have a TX, the 400 comes with a sweet tx and a decent charger. If you have the money, the 400 is easier and more fun to fly.