nero. there was a time when nero wasn't even good. but what always seperated nero from the others, was the fact that nero will always address any problem with it's software, immmediately.
I haven't used Nero or CloneDVD, but I have heard only good about them, but for me, I use Blaze Media Pro, I have only had it for about a week, so I wouldn't be able to tell you much about it.