Do the LG. I ordered a Samsung once (S183L). It was DOA, so I returned it outright and bought my LG.
The Samsung has a few more features than the LG, like the ability to perform disc quality scans. The results, however, are not reliable. As far as burn quality, LG is exceptional, regardless of the media used. I find that LG really shines with double layer media. The ONLY annoying thing about owning an LG writer is that you must set the booktype, if you care to do so at all, after every restart, which isn’t that big of a deal to me.
I’d go with LG, but it’s up to you. Check out the reviews/forum for scans of the media that you use most often to get a better idea of which will work out best for you.