what is the best DVD burner for Mac OS Lion

I've recently bought a new iMac Lion desktop and was very disappointed to find out that I can't download DVD burning software. Is iSkysoft an okay software to use and is it better than iMovie.

I have also lost recent imports from my camcorder to iMovie because it shuts down!! I can't believe the new iMac SHUTS down unexpectedly!!!! I thought only PCs would do that!!! I am really annoyed.

Any ideas on how to find that hour of video on my computer?

thanks

J