I replaced a pair of ELAC Uni-Fi UB5s with the 906s and am very happy with them. To my ears they offer a big improvement (as they should based on MSRP). At what the 906s tend to go for used, I think they offer excellent value. I drive them with a Rega Brio 2017 and have them beside my TV in a small room similar to yours in size. In a larger room I would likely want more power than the Brio offers.
Cheers
Cheers