The Sophia. First, it's a better match with your amp. Second, the 5.1's are getting fairly old. The material they used as face padding starts to crumble with time. You don't want to know what they want to replace it! Unless that has been replaced on the pair you're looking at, DQ.
I bought my 5.1's early on. While I can only speak for my pair, when I was about to sell them I noticed that the bass drivers had developed some hairline cracks. Something to consider on speakers 15+ years old.
In the Wilson line, the Sophia. But unless you're going to go with a more powerful amp down the road, even with the Sophia you're not going to be able to take full advantage with 40 watts.