Moto Man
I have the same Joseph speakers you have in the exact same size room you have. I had the same thoughts/concerns you have. I purchased a pair of Sopra 2's, thinking these will be better in the 10X10 room. Over much time, I have concluded the Joseph's are much better speakers for the room, even though the Sopra 2 is an overall better speaker.
The Josephs sound better due to the 10X10 room size. The Sopra's are a much better speaker in my larger room main system. But they do not perform as well as the Joseph's in the 10X10 room.
In my opinion save the money, the Joseph's are perfect for the 10x10 room and relatively speaking are an A in the smaller room while the Sopra's are an A in the larger room, but neither would perform as well if I switched them. The room size really made a difference with these speakers.
Hope this helps.