yeah I was gonna ask the samething, which one to get 32 or 64 bit?
neither. requires top end hardware, downgrades performance, DRM problems, can be used to block apps M$ doesn't like, onerous copyright protection "features", limited reactivation with hardware changes, unknown security performance, limited driver availability, etc.
I wouldn't use it if it were free - and the rapid proliferation of activation cracks assure that it will be
of course, its brand new.