I have the Special 25's in a 15X19X8.5 room. They fill my room very easily. I think they might be a bit much for a room your size. They have incredible bass response, but to get that they need to be into the room at least 3'.
The 25's and the C1's are two of the best monitors out there. I think the 25's are more suited to your taste in music, but again room size could be a problem. I have never heard the S1.4's, but I have listened to the 1.3SE's and they were an incredible little speaker.
The 25's and the C1's are two of the best monitors out there. I think the 25's are more suited to your taste in music, but again room size could be a problem. I have never heard the S1.4's, but I have listened to the 1.3SE's and they were an incredible little speaker.