Ubuntu is the best to get going with, Nero? who needs nero when you have K3B! thats the clone of nero for linux and I believe there is FFMPEG for encoding under linux so thats all fine!
i use those two and they are faultless!
if you still would like to use windows apps then ubuntu has wine preinstalled so a simple command of:
wine program.exe fires it up lovely
games? well theres loads of loki installers to help you out there.
and everything you want can be found in synaptec package manager, or by using apt-get in the terminal.