When I was in competition, I used some Kicker speakers with very large special crossover components as well as some Diamond speakers. The Kickers always did better at competitions. My personal favorites were CD Technologies....previously known as Cliff Designs.
Of the current stuff, the Hybrid Technologies line designed by Scott Buwalda are probably among the best out there along with Dynaudio and Focal. Was a time when MB Quart was competitive, but not so much now.
Hibuck...