Check out John Lapaire's Theater four π speakers, which he made taller and narrower than the original, retaining the same volume and making a tower configuration.

John Lapaire's Theater four π tower speaker with MK2 beside it

Another interesting speaker is Martinelli's Arrezo, which is essentially a Theater Series three π in a tower configuration. It was a big hit at the Midwest Audiofest.

Martinelli Arrezo

There's definitely some really great work being done by you guys.