It would be easier to advise you, If you revealed what you're intending to burn? IE; backup data, make home movies, copy DVDs to play on home theatre system?
Anyway I'd go for a burner that covered all formats, then the only decision you've got to make from there, is which burning media to use for what purpose.
<b><font color=purple>Listing your system specs, will greatly aid us, in being able to help you solve your problem.</font color=purple></b>