Which Linux Distro should I get?

First off, I'm a linux newbie. I'm just trying to experiment and experience a different OS. It has to be compatible with my Macbook (Intel Mac). And I'm looking for a sleek, polished look, preferably with that crazy "3D Cube" desktop feature that I've seen on Youtube videos! Any help appreciated!
For Which Linux Distro should I get? try this:

• My recommendations, as I have seen nwebies find it easy, from easiest to the harder ones..
  
  Mint Linux
  PC Linux OS
  Ubuntu/Kubuntu/Xubuntu/Fluxbuntu
  Mandriva
  OpenSuSE
  Sabayon
  Debian
  Fedora
  Slackware
  Gentoo
  
  If you are seriously considering using Linux for long, I suggest you look at one of Debian, Ubuntu, Fedora or Slackware. All are original in their ideas, and all have a good respect among seasoned Linux users.
  
• you can't go wrong with anything debian-based.
  
  Some of my personal favorites are:
  Linux MInt
  Ubuntu
  Debian (I don't recommend it for beginners)
  Damn Small Linux (for really slow computers)
  Puppy Linux (Also for somewhat old computers)
  
• All of them.
  
  Well, maybe not all of them. But anyone who says "You should use this" or "You shouldn't use that" is denying you the very thing Linux embodies: choice.
  
  So I'm going to recommend several that I have tried, and let you see for yourself whether you like them or not.
  
  Ubuntu:
  
  http://www.ubuntu.com/
  
  Kubuntu:
  
  http://www.kubuntu.org/
  
  Freespire:
  
  http://www.freespire.org/
  
  PCLinuxOS:
  
  http://www.pclinuxos.com/
  
  Puppy Linux:
  
  http://www.puppylinux.org/user/viewpage.php?page_id=1