Best speaker between 15K-35K

Hi there, I am interested in everyones opinion as to what is the best speaker between 15-35K. I know is is a big range but I can afford up to 35K. Mark Levinson 432 is probably the amp and AR tube Reference 2MKII is the preamp (their top of the line) Tri Vista is the SACD. PLEASE HELP. I was thinkiing about Vandys 5As, Watt/puppys 7, Salons Avalons whatever you guys think. Thanks in advance to all the great minds.