Just a little follow up...
The XLS200 arrived 2 days after order (to Denmark) - pretty fast
First impressions are way better than I expected - build quality is excellent, and it's really small. I was affraid the XLS200 would be a setback compared to the borrowed System Audio sub (2 times more expensive and much larger cabinet). But I think the BK is way better - bas is smooth, fast and dynamic.
It was also much easier to calibrate with my exsisting setup.
So I'm just very happy the XLS200 - best money I've spend in a long time!
Thank you BK!
http://i48.photobucket.com/albums/f207/plex_dk/1725a5fc.jpg