fedora pretty much = redhat10 (i havent tried fedora).
i have tried rh8 and rh9. rh8 better than 9.
if you're relatively new to linux, i suggest libranet.
by "run multiple OS", do you mean at the same time? if yes, i dont see how a performance increase will result.
ntfs is readable(and writeable) by linux (its part of the kernel now, and if you are using some older kernel, then there are packages available that will let you - i have used an rpm for the ntfs support before, and it's been mentioned here in these forums)