Based on the information you stated, you would be able to shoot 1080i/50fps then convert to 1080p/25fps. Most HD TV’s read progressive, but with interlace it will show the picture with two cycles and progressive will do it all in one cycle. Therefore the quality should not be a dramatic difference. The major difference will be the frames, which will create the effect you are trying accomplish.
I would assume once you complete shooting, you would probably do some effects in post production. In addition, you can enhance the minor quality concerns in post.
I hope that helps.
Jewels P.
AA-Rental.com