[olug] best linux distro for...

[DYNATRON tech]

hey,

i've got a 1/2 TB, P4 (hyperthreading) dell server with a Nvidia 5200 dual
display card.

i've got about 20 different linux distros, but i'm not sure which will be
the most painless to install.
i'm looking for a setup where the desktop spans both monitors, and i'd like
both KDE and Gnome.
my only other requirement is RPM.

any suggestions would be excellent to hear.
the server came with an outdated copy of red hat, but i'm not very enthused
about using that.