From my experience when I first started with Linux , I tried over 50 Linux distros, most of them where excellent in one area and poor in many others. Finally I setteled on Fedora Core as it was balanced and it substituted win xp pro on all my systems.
In your case, here are my suggestions by order of importance :
1- Fedora Core 4 , available in x86-64-32 bit versions, and powerPC version that can be dual booted on a mac if you have one.
Fedora Core has to be one of the most supported distros out there, for example if you go to most manfacturers websites out there you will find that Intel has their Graphics, Wireless Lan and other drivers in a Fedora compatible RPM form, Adobe has the Adobe Reader the same way too and many others have the same thing.
Fedora Core 4 is very easy to install, configure and maintain and I just love everything about it.
2- SuSe is a great distro, very very easy to install , it has this polished feeling to it, it's oriented towards a less technically advanced audience than many other distors. The latest version openSuSe 10.x was newely released, though I don't use it because it's not as well supported as Fedora Core but it is comparable to it, and Yast is very easy to work with.
3-Mepis, a nice distro that is very easy to use and not too heavy on the technical side.