Vision Express 2 is alot better than the old version and Nero are making slight improvements with it all the time.
It depends on if you want lots of different burning programs on your PC or a few from the same company which hopefully won't conflict with each other for a reasonable price.
I have just converted a 2 hour video to DVD and nero Vision express 2 does this just fine.
If you want to have lots of different options fade in's and out etc Pinnacle Studio 9 is the way to go, Nero Vision Express2 does do a lot of things Pinnacle does but not as well.
If you want to back up your DVD movies, I suggest using DVD Shrink 3.17 it is a free program and uses the nero engine to burn to a DVD you can get it from www.mrbass.org
I hope this helps