On the SVN Windows binaries download page, there are a few to choose from:
http://subversion.tigris.org/getting.html#windows
Are there pros and cons to the different versions provided by the different organizations? Is there anything I should look out for?
Mainly, I just want something free that I will be running off my Vista laptop. Then I will probably do backups of the SVN files from time to time to an external hard drive.
We chose VisualSVN bec it makes it easy to use windows authentication instead of having a separate SVN user.
Other benefits is an easy to use GUI for permission management and for managing SVN hooks.
The one thing I'm not a real fan of is the web GUI. As far as I know you cannot view web based diffs, so if that makes a difference....
We use an Apache SSPI module with the Collab.Net subversion server.
Has worked perfectly for us.