I don't really know the LS 16, but I have an LS 25. IMHO it's at the drier end of the ARC spectrum - more neutral SS than romantic tube sound. That seems to polarize opinion. Some love it, others not so much. I also own a few other preamps that bark up the more traditional tube sound tree. I'd be hard pressed to recommend one over the other because they all sound different enough that other factors (system match, room, etc.) become dispositive. At the end of the day, I suspect that it'll come down to system matching and personal taste.
Marty