To Fedora or Not to Fedora

I'm presently trying to figure out what Linux distro to install on my church's library computer. It has been running Mandrake 9.2 for some years now, and as it is in for a “overhaul,” I thought I should give it a new OS. I was going to do Ubuntu, but I cannot even get Ubuntu to startup all the way, which makes it impossible to get to the installer. I think that is because the system only has 128 megs of ram.

As such, I was trying to decide between Fedora Core 6 and openSUSE 10.2 My main goal is to go with a system that will require minimal effort from me. I also am insisting on GNOME as the desktop (well, it is going to be a web kiosk, so primarily all the user will see is Firefox, but I digress). I think I'm going to go with FC6, but I'm open to those who want to persuade me otherwise. I'm really not too keen on the idea of an OS that uses anything other than RPM or DEB packages, but that too is negotiable, if anyone can come up with a good reason why I should try something else. The big thing is time: I need it to work as a desktop out of the box without any X11 tinkering or anything else of that kind.

Thoughts?