I'm not 100% sure of the best 64 bit version now, I'm getting my 64 bit computer in a couple days here, so I'll find out soon, however, NTFS will be a problem, linux isn't made to handle NTFS, and won't run on it, if you are running Windows on NTFS, you should probably get a program like partition magic and partition your drive to allow you to boot linux and windows on separate partitions.
~Lyuokdea