Bombaywalla, Apogee Calipers, Divas, Duetta Sigs, with mostly Krell amps of various vintages.
I've heard them in the homes of folks involved with both companies. They can be a nice audio experience, unlike many speakers that just hurt my ears or are so full of distortions and colorations that I would not even bother writing about them.
However, the bass is never really right, and there is always a midrange coloration on transients. Nearly every Apogee owner I have ever known stays away from music they do not do well on which includes, but is not limited to, music heavy in bass transients, music using lots of standup bass.
The newly updated models from Magnepan are truly superior, much more neutral, much easier to drive. I do not own them, I know nobody at Magnepan, but if I wanted a panel speaker I'd have them.