KEF R3 vs R5

I wonder which one is better for my taste. The new R series 3 vs 5 (R3 is the bookshelf version and R5 is floor standing version)

I am looking for good imaging and big sound stage.

My room is quite large with double tall ceiling. 

Please give me you opinion. Anything is welcome !
1d8c94af 0c3e 4c7d b212 8b8cffb18aacviethluu
The bookshelf will most likely image better.
in a big room you will probably want a sub with either one.