I definitely understand your logic. It was one of the reasons I went for standmounts. I demo'd the Silver 200's and the sound seemed thin & definitely lacking in bass, compared to the Silver 100's. This actually surprised me a bit, considering the 200's had an extra bass driver. This demo was in store side by side rather than at home.Floorstanders need a lot of room to breath and are suited to larger rooms. If you have the money for a pair of silver floorstanders, then look at the gold 100’s as an alternative instead. It’s what I upgraded to and will be much better suited to a room of your size.
But then I'd also want to upgrade the centre speaker to match, which is another 1k on top or around £500 more than the Silver C350!