The highest from Dell is the Dell XPS Gen 5 with 3 bays for dvd burners. If you have the money, go with the Dual Core Technology.
From your list of burners, I would pick BenQ 1640, LiteOn 1693 and NEC 3540. They all are good and have scanning capabilities. LG 4163 is actually a very good a burner but can't scan.
Please note that for burning, it doesnt matter if you have a dual core 3Ghz or not. As long as you set it up correctly, even a PIII 1Ghz machine with 512MB memory is just fine.