You could try ATC active 100's they are 15K and include amps for each driver and external crossover. Also Talon makes some highly regarded speakers but I have not heard them.
I sort of doubt other speakers you mention would be a significant upgrade over Thiel 6's. Actually I can't think of any speaker that would be a big improvement over the 6's. Maybe other can though.
I sort of doubt other speakers you mention would be a significant upgrade over Thiel 6's. Actually I can't think of any speaker that would be a big improvement over the 6's. Maybe other can though.