Having owned a couple pair of Wilson speakers. . .
First, 100 watts (8 ohms) of power is generally sufficient for most Wilson speakers - they are pretty efficient. Though I think in general terms that more power is frequently better in general.
Second, I have run various Wilsons in rooms smaller than your with excellent results. I have not owned the Sophia's as I personally like the WP better for my listening preferences. The W/P run in smaller rooms than yours have done very well.
In terms of a replacement, I cannot recommend highly enough the Wilson Duettes. However, perhaps your problem is that you don't like the Wilsons in the first place, then perahps the Duettes will also not be to your liking. I ran the Duettes in both nearfield and regular listening positions with terrific results in both. They are much less susceptable to placement, very good flexibility and have external cross over (included) that allow for tailoring the sound to your room via easy to replace resistors (these are included with the speakers and are no more difficult to change than wiring the speakers from your amp - 5 minutes no electrical experience - no tools - well maybe a screw driver).
First, 100 watts (8 ohms) of power is generally sufficient for most Wilson speakers - they are pretty efficient. Though I think in general terms that more power is frequently better in general.
Second, I have run various Wilsons in rooms smaller than your with excellent results. I have not owned the Sophia's as I personally like the WP better for my listening preferences. The W/P run in smaller rooms than yours have done very well.
In terms of a replacement, I cannot recommend highly enough the Wilson Duettes. However, perhaps your problem is that you don't like the Wilsons in the first place, then perahps the Duettes will also not be to your liking. I ran the Duettes in both nearfield and regular listening positions with terrific results in both. They are much less susceptable to placement, very good flexibility and have external cross over (included) that allow for tailoring the sound to your room via easy to replace resistors (these are included with the speakers and are no more difficult to change than wiring the speakers from your amp - 5 minutes no electrical experience - no tools - well maybe a screw driver).