FSFS or Berkeley DB

Hopefully some of you guys could help guide me on this one....

I've read the document http://web.mit.edu/ghudson/info/fsfs and it
sounds much better than running Berkeley DB. But then comes the line
about immature code. This normally wouldn't really bother but we are
running Subversion as our *only* version control system for about 100
engineers. Like everyone, our code is extremely important. I would be
beheaded for proposing a radical new file system that corrupted our
data a later time :)

Yes either way I would have backups but restoring from backups can take
a long time. We have many repositories.

So my question is this. Would you use FSFS or Berkeley DB if you were
me?

Thanks!

Sean