Having second thoughts on Khorns Need help

Hi all: I am starting a two-channel set-up starting with speakers,amp (tube or s.s.),also c.d. player direct to amp to be decided later. I had decided to go with Klipsch Khorns originally and have done research on the net for about 6 weeks now.
I am now having second thoughts, given the type of music I listen to, mostly rock and LOUD! I am a little concerned about whether the Khorns can produce the bass on this type of music to my liking! I will not be buying these for another 6 months,so I am open to other suggestions for speakers.
I am looking for floor standing full-range speakers that can fill a 12W x 24L x8H enclosed with tight,
chest-pounding bass on it's own, without a subwoofer. I listen to Van Halen,Dream Theater,Greenday,Led Zep,Sherryl Crowe, Colin James,Collective Soul,Metallica,etc. No classical,jazz or hip-hop!
I realize that some speakers sound better with certain types of music and the electronics,(source and amp), plus the room have an effect on how a speaker sounds! I guess what I am looking for(asking), is a pair of speakers that play "rock" well! I can go up to $6500 for a pair. Amp and source to be decided later, depending on the type of speakers! Interested in all comments!Thanks, Huck