I wouldn't buy anything before you've checked with
DVDRHelp, who have user reviews of dozens of DVD burners.
Personally, I would never buy a no-name burner just to save a few bucks. You'll end up wasting more money on coasters than you saved buying the drive. There are a few brands worth considering, Pioneer, Lite-On, Plextor, NEC.
As far as vendors go,
AccuPC,
Livewarehouse, and
Newegg are well regarded vendors with competitive prices.