[texhax] which TeX?

[Michael Barr]

This is probably not the right forum to ask this question in, but maybe 
someone can point me to a better place.

I just got the TeX Live 2011 DVD in the mail.  For at least a decade now I 
have used one form or another of MikTeX for Windows.  But I noticed 
something called ProTeXt (based on MikTeX) and various other things 
(ConTeXt) on the cover of the disk.  I have no idea what all the 
variations are and which one is best for me.  Where can I find these 
things out?

Michael