I currently have the Sonics Allegretto floorstanding speakers and, after owning LOTS of other brands (Spendor, Totem, Sonus Faber, Dynaudio, Living Voice, Ref 3A, etc.), feel they're the best-balanced I've owned. All the attributes I value are there, including soundstaging, magic midrange, great dynamics, and most of all, a very involving, emotional presentation.
I'd think strongly in the future about moving up the Sonics line and recommend the Allegretto, but admit that I haven't yet heard any of the other models. Joachim Gerhard came up with some great designs for Audio Physic and seems to have taken them to the next level with Sonics.
Good luck!
-Bob R