I have the opportunity to purchase a pair of S412P or a set of L890 for essentially the same price ($600-$700). Both are in very good to mint condition.

Does anyone have any opinion as to which would be the better value?

The S412P is unusual as each speaker has a powered subwoofer built into it. For its day, it was advertised as the "flagship" of the line. The L890 has received a lot of very good reviews on the net. I have seen another member of the Studio L Series, and was reasonably impressed.

These will be used in our living room for mostly home theatre.