ZFS/btrfs/ext4

I have a 150GB partition (on a drive shared with a Vista installation I need to clean up) on which I am to place torrents of shows and music. Large files, write once (and write slowly, in the case of torrents) and read variably. Data integrity and longevity are my favourite.

I already stuck btrfs on top of ext4 and lost 50GB of free space (with only 6GB of data there in the first place). Should I bother trying zfs or just revert to ext4 and hope I notice my disk dying in time?

Also to stay on topic, post your favourite touhou and their favourite programming language.

Data integrity and longevity are my favourite
I already stuck btrfs

Then use ZFS, ``faggot''.

My favorite Touhou is Kawashiro Nitori and she made an ANSI C compiler in Haskell.