@Markerrag -- Don't let the sheer number of Linux distros keep you from trying out the operating system. Yes, there may be over 300 distros, but a lot of those are highly specialized and won't suit your needs at all. I'm talking about versions of Linux specifically made for audio production and such.
No, do some research and fine the top 10 Linux distros or so. Research those. Download the ones you really like and try them out for free (any Linux distro site worth its salt will tell you how to make a "live" Linux drive you can boot from a thumb drive so you can try it without installing). Once you've found a distro you like, install it.
Oh, and make sure you figure out which ones have the most active support communities during your research. If you are new to Linux, the chances are good you will need some help. Thankfully, those Linux folks are happy to help each other out through dedicated forums, so take advantage of that.