Seeker2 is absolutely correct.
First, you need to look at your sources for media and decide which ones you want to use. If you are willing to buy online and live in the US you will not be limited, so get TY or Verbatim.
Second, you need to determine which DVD players you will be using as some are picky and you might need bitsetting. Read up on it; not all burners support it.
Third, you need to determine if you want t rip a lot of DVDs as some burners are faster than others.
Forth, you need to ask yourself if you want to scan your burns for burn quality. You don't need to if you stick with quality media at rated speeds but a lot of us do and find it rewarding.
Do some reading on these subjects as suggested above. and then you will know more about what you need before you buy.