"I am currently using the Focal Solo 6 Be and about to take the ATC plunge. My sales rep. mentioned that he auditioned both of the STC models and recommended the SCM25A model. I was just curious if anyone out there has used both models and what your thoughts were. I know the 20ASL has the new tweeter and the 25A does not. Wondering if it's worth saving up the extra funds to go with the 25A, or if the 20ASL is the way to go? I have a space that's around 500 sq ft. that is not professionally treated. Just curious about your thoughts. Thanks!"