Silverline Sonata-III vs. Sonatina-III with Cary


Still hesitating what speakers to order - Silverline Sonata-III or Sonatina-III to be used with Cary SLI-80 integrated amp in a 12x8m room. Would the Sonata-III be too much in this room (boomy bass, standing waves, etc.) or not?
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I have a Cary SLI-80 matched with a pair of Sonatina III's and it sounds great. My room is approximately 12' by 17'. They are pulled out about two feet from the back wall and spread about 8' apart. The bass is not boomy but just right.