Subversion's version

Hi,
I'm migrating from CVS to SVN, and after a few weeks of reading and
cleaning I think I'm ready for the change.
However, when everithing seems to be prepared I see that in Debian Sarge
I only have subversion 1.1
I can use the package in the development branch, which is updated more
often, but I don't like version changes in my production servers.

Are the possible headaches of upgrade every few months worth it, or
should I stay in a an old but not moving version?

And also, how painfull is upgrading? does it imply repository
conversion? Reading cvs release notes I understood that this does not
happen often, but i someone could confirm this, please?

Thank you very much.