appropriate python version

[xamdam]

Sorry if this is a stupid q,
I am trying to figure out the appropriate version of Python(2.4 or
2.5) for an XP 64 system running on an Intel Core2 Quad. Python.org
has a to a 64bit build, but it specifies Itanium as the target. Should
I just be using the regular build?
I was also thinking of getting the Enthought edition (http://
code.enthought.com/enthon/) - would their binary work with the setup,
and what would be the downside of using it over the special 64bit
build?

thanks,
max.