What would be the best filesystem to format a new 16GB microSDHC card to use exclusively in N900? Loose requirements:

1. It should compatible with N900, auto-mounting if possible
2. I don't have any need for it to be compatible with Windows boxes. Anything that can be read by Linux is fine.
3. It should have wear leveling or something to prevent it from going to waste too early.
4. It should provide good performance
5. It should provide POSIX-like features: (symlinks, file attributes, etc)

What would be the best option? Ext4 or ext3 without journaling?

What are your thoughts on this?

Thanks