On the other hand, I've had some extraordinarily bad experiences with ReiserFS, including with their recovery tools. The lack of FS-specific backup and recovery tools bothers me, too, perhaps needlessly.

I have had some good experience with XFS, and the fact that it can be grown easily might be a plus for your SAN-including plans.

I've had no problems with ext3, but it's not particularly advanced.

I have no real experience with JFS.