Search around sites like newegg, tigerdirect, outpost, froogle, etc..
They are fairly cheap now.. there really isn't one BEST one because they all pretty have the same technology and do pretty much the same thing.. but name brands that you can look more into are like said.. NEC, LITE ON, SONY, MEMOREX, etc.. it just depends on your liking..
its usually the higher the speeds, the better.. but you have to look into the background of the manufacturer and do some reviews to see if it had any worldwide issues, or problematic issues...