What is the most (or if too difficult, let the verb be "are") bang for the buck DVD burner one may acquire and is not a one sheep burner?
I would say LiteON, LG and NEC offer the best value for money as well as decent quality. Also BenQ are another company, especially if you get an OEM drive.
1650,1655,111, and 1670 rebaged at Freys. All can be had cheap and work well.