All immature distibution jokes aside, RedHat 9
is worth the upgrade (especially if you have newer hardware, such as video cards, that you want support for). RedHat 9 fixes many of RedHat 8's bugs but, of course, comes with many of its own - not all of which have been addressed yet.
Riley has a point. If you are going to go through all the trouble of upgrading your distro, you may simply want to switch to a different distro. While RedHat is an excellent distro for newbies to learn on, most gurus I know prefer other distros. Consider visiting
http://www.distrowatch.com .