The choice of your burner all depends on what you are going to use it for.
I would suggest reading through this forum, especially older posts (search function is not working properly, but set viewable posts to more than one week).
Lite-On provides good quality for lower price, but Plextor is the best, only with Safedisk 2 protection it has problems now and then, if I am not mistaken.
If you want to copy audio only get Plextor for sure, if you only plan on copying games, you mighth want to reconsider...
But do read other posts as well...they are a big help