@martinman What do you mean by 'too small for my room'? Not reaching the SPL you desire? In the mid range or bass? or just 'not loud enough'? I did not see a subwoofer in your equipment list. I use a subwoofer (in both of my systems, one very large, one normal room); do you think a sub would help your problem?
I am considering small (bookshelf, stand) speakers for my large system, since they are often known for providing a wide and deep sound stage and imaging.