I've confirmed with my system that 100s and Walsh 5s sound mostly the same in a small to moderate sized room.
If you do not have bass deficiencies, there is no reason to go larger in a room of a particular size.
Larger rooms will benefit in bass and overall performance weight from larger Ohm Walsh models.
In my largest room, ~ 20'X 30' and L shaped, the difference from 100s to Walsh 5 is marginal as I've described.
The Walsh 5's could go in much larger rooms than any of mine.
If you do not have bass deficiencies, there is no reason to go larger in a room of a particular size.
Larger rooms will benefit in bass and overall performance weight from larger Ohm Walsh models.
In my largest room, ~ 20'X 30' and L shaped, the difference from 100s to Walsh 5 is marginal as I've described.
The Walsh 5's could go in much larger rooms than any of mine.