Best Journaling File System - ZFS/???

[Wojciech Puchar]

>> what file system would you choose? What options are out there besides
>> UFS and ZFS? What FS's are least likely to have corruption issues
>> when there are power hits?
>
> May be UFS + gjournal.
> I use gjournal since FreeBSD 7.0 and it seems to work fine.
is it really smart enough to not write everything twice or am i wrong?