This is one I have been watching for over a year. Unfortunately, it seems the system requirements have outdistanced my hardware during its long development cycle. I have heard complaints that the 1 gig min. is too low. I think the recommended is 1.8. While I realize I am woefully over due for an upgrade, this one seems to be quite the hog.
I have read EuroReviews and many seem to think they finally got the RPG/RTS mix down. OTOH, Europeans are nuts and continue to buy Settlers games, so who knows.