With excellent quality disc, basically every burner can obtain excellent results. The difference is so minimal that is not worth to make comparisons.
If you are anyway interested in disc scans, then liteon drives are the only available option. Generally, for writing quality, liteon drives are not considered the very best (if you are particularly picky). An excellent drive (if still available) is the Pioneer 116, but also the Optiarc 72x0 drives are good