What has the same sound as Ref. 3a ?

I currently have the De Cappo i's and really like them .
I have moved into a larger room , 22ft. X 13ft. , and now need more bass . The kind that I can feel but with clarity and definition . I don't need to go into subwoofer territory but do need bigger drivers . I don't want to do the blend-a-sub thing .
I can't afford new Grand Veena's and they seldom come up used . Especially in an area near me . Just trying to find others to keep a watch out for .

Thank you .