Dynaudio makes great speakers! Both the R300 and X16 are rear ported so they need open space behind them so don't try to put either on a bookshelf or closed cabinet. I have not heard the R300s but based on reviews they would be my choice if they will work for your space. They are a 3 way speaker and not small but they are less than 45 cm tall (38.5?).
Main Kef: Reference 205/2 & 202/2c, Surrounds: Kef XQ40, Velodyne Optimum 12, Integra DHC 80.3, Ayre K-5xeMP, Oppo BDP-103, Bryston 4Bsst2, Parasound Halo A31. Second B&W: 685 (3), CCM618, Def Tech Powerfield 1500, Onkyo TX-NR1008, Zone 2 Klipsch AW650.