High value, giant killer speakers?

...all these amazing and rather consistent suggestions are making me want to rethink my solution to this problem.

Has anyone tries a pair of properly powered Infinity Kappa 7’s or 8’s? How do they compare to the many suggestions here?

"Everyone's favorite is a "giant killer". Has to be in order to assuage the restless ego. Heaven forbid you actually spent money on an average performer!"

No ego here... and I think I spent my money on an average performer.

"A purported giant killer that can't do under 35Hz +/-3dB? Really? I think not."

Maybe a speaker itself won't do that... but with proper placement it's not to hard to make the room go that low.  I only use my sub for movies... so something is working for me.  :)

On the other hand... There are "giant killer" desktop speakers. Near field as well.

If you can find a used pair of Cambridge Audio S30’s? Cheap.. Giant killers!
Phase coherent and excellent sounding speaker.   
Excellent sound always trumps impressive specs in areas most do not listen for. 

Just who are these giants we’re trying to kill with our speakers? I'll apologize in advance :-) 
FWIW, I enjoy Wilson Cubs with sub woofer. 

Depends.....  how big is this Giant??  
Zu Dirty Weekends at $1000.  It may not be your last speaker, but it should maybe be your first or second.  I have 3 other pairs of speakers in the $5k range, and I am liking the DWs VERY MUCH!  All 4 pairs are full range and of very different designs, and the DWs can hang with them in overall enjoyment.  Oh... and they look cool too.....