Krzysztof: BZR
- Git supposedly has some problems on Windows; we are short on Windows developers to debug any issues that crop up, so this is an important consideration. - Bazaar supports SVN-style checkouts: everyone can use the same commands as before, but replace 'svn' with 'bzr'. Git does not allow you to commit to remote repositories, so despite what the 'Why Git is better than X' site says it doesn't support the SVN workflow directly. This might waste more time than would be gained by Git's performance. - Bazaar can do the equivalent of 'git switch' with a plugin: http://bazaar-vcs.org/GitStyleBranches - Launchpad integration.
Disclaimer: I do not use any DVCS heavily. I used Bazaar for a small two-person project and was satisfied with it. I tried to use Git once but was somewhat intimidated, so other developers which do not use VCS tools heavily might feel the same.
Regards, Krzysztof Kosiński