Linux File Systems - What is the most reliable, most secure?

Here is some info I've found.
http://www.tldp.org/HOWTO/Filesystems-HOWTO.html

This will be for a dual boot setup Windows and Linux.
For windows NTFS is the best (IMO) for hard drives.
Sharing data between partitions is not that important as I can transfer via DVD, UFD, or floppy. I also like the idea that windows can not natively access Linux File Systems.

ext2 seems to be popular.
ext3 adds journaling. About how much slower is ext3 compared to ext2?

What about reiserfs V3? It is the default FS for SUSE and supports journaling.
How does reiser compare to ext3 in reliability, speed, security?
Reiser4 is now available.
If I install Reiser3 now, I will need to reformat and reinstall the Linux OS to be able to upgrade to Reiser4, is that correct?

So, what should I use?
That page also had some links to Linux Encrypted File Systems. What about those?