How did you get on?
I was thinking about AndyLandy's post about red hat. Made me think I have only used Debian based os's. (I dont use windows at all)
I decided to use my spare partitions for some tests. My rig is simple:
ATi x800, p4 3.4ghz with 1.5 gig ram. Not great but plenty to run an OS
Started off with Mandriva KDE4. wow has KDE4 got nice and fast now, Loved the way mandriva made it all fit together, But KDE4 still gets laggy if you have lots of stuff open and running. This is no good.
Tried mandriva Gnome, lots of issues here with crashes.
Moved on to opensuse, I hate the way I am forced to start with compiz desktop effects. Its great fun to use the linux cube and wobbly windows as a first time user, but after two years it gets boring. opensuse should do what mandriva does and ask at install if I want compiz installed. It didnt so it was deleted.
Fedora, wow what a distro. Wish I tried this ages ago. Looks great, fast install. Very stable so far. Using the Gnome edition. I also think rpm packages install faster then deb's. I have used debs for two years so was a little scared about going to rpm. I find rpm very nice to use.
Thanks AndyLandy, if you had not mentioned Red Hat which made me think RPM I would not have tested these distro's.
Still have not tried Red Hat itself but I will get around to it.
Screenshot of os so far, still needs some work on conky:

---------- Post added at 00:40 ---------- Previous post was at 00:36 ----------
Any linux users want conky help, I made a great thread here:
http://forum.mepiscommunity.org/viewtopic.php?f=40&t=26272&hilit=conky
My username is voorhees1979 on that site