I have the following types of security software installed:
Well, that about covers it for security related matters.
As to other things I need:
If you want ACLs available in Tiger (or presumably anything 10.4.x >) you need to enable it on a volume using fsaclctl and then you use ls -e to view them and chmod (+|-)a to create or delete them. Please read this apple article for information on ACL implementation, inheritance etc.
To use and fiddle with spotlight on the command line use the mdXXX tools such as mdfind and mdutil.