I had the de Capo's and then upgraded them with beryllium tweeters. A beautiful, full presence with lush mid-ranges and crisp highs. Their basses were comfortably extended without bloating. They would do well in your size room. Be sure to have a good speaker stand and place their tweeters on the outside. No toe-in necessary. If you're looking for that warm cabinet sound, as you indicated, they're the ones for you.
The Spatials, though, are also good and have that money back return if you want to go through the hassle.
The Spatials, though, are also good and have that money back return if you want to go through the hassle.