HI Von Hoellert,
I'm located in Italy, I had Cornwall 3 for several years.
Some weeks ago I heard Cornwall 4 at my dealer: very good speakers, especially in the medium frequencies.
The dealer wants 4800 € for difference between 3 and 4: at this moment I think that 4 doesn't deserve this huge difference, but this is a very, very personal evaluation...
I like my Cornwall's 3 very much, maybe in the future I'll think about for an upgrade.