i prefer mandrake, but any linux will do!
just pick one and install it
so many people plan and worry about installing linux, and ask "which distro should i use?"
just get a spare HDD, pick a damn distro and install it
if you dont like it, you can always go over it with enother
keep trying new distros
ive tried a number of distros and they are all pretty good
just make sure you dont give up ;-) if it seems to get too hard. for a beginner it will seem very difficult to install and use, just keep trying and EXPERIMENT!!!