I am learning on a Blade CP right now, and I am having an absolute blast with it.
There is no doubt I will continue in this hobby and buying another heli is already entering my mind.
I plan to continue learning with the CP, but definitely want to move up in size and pick up something that will be better suited for outdoor use. I hope to be ready for it by summer.
ARF or kit is ok with me, I actually would not mind putting one together to learn all about it.
Price is not really a concern, but I also do not want to buy more then I can handle, or need at the moment.
Parts availability and upgrades are important considerations for me.

What do you think is a suitable second heli for someone just getting started in the hobby, but plans on staying with it?