As was said before, you will need a charging system. If you want to use a pump be aware that not all airguns can be charged from empty using a pump and some, like the theobens loose their warranty if a pump is used.
This was the main reason I have the PCP's that I have.
As far as I am aware all PCP's can be topped up using a pump.

Most importantly you have to try a few rifles for size and fit.

Rob