for vfx use what you can afford - see table of digital formats aim for the higest chroma-subsampling i.e. 4:4:4 and the the higest data-rates
you can use DV, but you have to spend more time in post making compromises.
A cheap and good option for SD effects is analouge betaSP by hireing old equipment that have broadcast rather than prosumer features.
but as previously stated, as long as your idea works and you have advice from some cool moving image caftspeople you could shoot on whatever. i.e. dont decide on technology before you know what you want to make, and then bounce those ideas with people that can help you make an informed choice.
you can use DV, but you have to spend more time in post making compromises.
A cheap and good option for SD effects is analouge betaSP by hireing old equipment that have broadcast rather than prosumer features.
but as previously stated, as long as your idea works and you have advice from some cool moving image caftspeople you could shoot on whatever. i.e. dont decide on technology before you know what you want to make, and then bounce those ideas with people that can help you make an informed choice.