I had the Monitor 11's/390 V6 for about two months but I returned them for the Studio 60's/690 V5. I am very happy that I did.
I find that the soundstage from the Studio's were better, not as bright as the 11's. The footprint of the 60's are smaller to that of the 11's which I liked as well as their solid build quality. In terms of looks (grills off when guests come over

) the Studio line is one of the nicest looking speakers I have ever seen in this price bracket. My opinion only of course.
The biggest difference however in sound quality was from the cc390 to the cc690. It was night and day for me when watching movies. Even my wife mentioned that she could hear the difference between the two.
Good luck!