What is your final broadcast location? Broadcast TV? HDTV? Film? If your making it for broadcast PAL TV, it will have to be 50i anyway to broadcast it.
It’s better to film in 25 progressive if you plan on converting to 24 full frames, as shooting on 50i and de-interlacing it to 25p and then converting it to 24p will give you a whole lot more of headaches.
Josh M