Linux has drivers for everything you find in your average desktop computer, in fact it has SATA drivers unlike Windows, however it is a bit lacking in drivers for wireless LAN cards (it doesnt support mine).
It's not the best version of Linux (I prefer KDE over Gnome). But it is very easy to install and use. It's very user friendly but it's not as powerful as other distros of Linux.
Then again, you can order the CD for free (including shipping) so it's a good choice for beginners. There are a large number of programs; once you see the open source world, you'll see so many advantages.
However, there are not many games being developed for these systems. Thus, Starcraft cannot be run without help. This is one of the main reasons why I don't use Linux (

). Of course, if you're not interested in gaming, you can always use it as a work environment. In which case, it is
way better than Windows will ever be.
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If you luv KDE, then you can get Kubuntu (Ubuntu+KDE).