From all that I gathered from several dozen posts about the Blade CP, the one thing you should not pick up is the Blade CP. You need to build significant capability with a larger and more stable collective pitch helicopter to have any chance at flying the CP. I have read far more accounts of people unable to fly the CP than I have read accounts of people feeling satisfied with them.
If you are determined that you are on the right course, you might want to get the CP Pro instead. Everyone agrees that a Lipo battery is better than NiMH. It costs less to get a CP Pro and downgrade it to a starter helicopter than it will cost to get a CP and upgrade it.
And I'm sure the forum has advice concerning the differences between the CP Pro and the Pro 2.

If you get the CP and have success, I would like to hear about it. It's in the price range that works for me. A CP was my first helicopter and I couldn't afford to fly it - or more correctly, I nearly went broke trying to fly it - so I sold it on Ebay and purchased a CX. Then I progressed with a fixed pitch single rotor, upgraded the the fixed pitch and eventually got a Belt CP. You'll find some who can actually fly a Blade CP but they are few and far between. The common description of the flight characteristics is "Squirrel on Crack".
Good luck and I'll follow this thread to hear what others have to say.

Most sincerely, another Young at Heart.
Soloboss