5300 - mid-range speakers
z680 - higher-end speakers
Z680> 5300. They'll probably be 2x as loud. Also Z680s got replaced by Z5500 and those compare to Klipsch 5.1.
right now Z680 = $275 , 5300 = $145, Z5500 = $279
Which means you should be comparing Z5500 to 5300s not Z680s to 5300s.
z5500 review
"At 9:00am I was woken up with a rather loud knocking at my suite's front door. Opening the door revealed the building's property manager handing me a noise violation complaint that was filed and the manager's office by my next door neighbor. This would sound perfectly right seeing I was easily hitting 130+dB when testing the system at higher volume levels but there is one interesting thing I have to inform you about my neighbor...........
She is completely deaf........No joke, she can't hear a thing. Nadda...Zilch....
What I guess caused her to file the complaint is that I cleared 13 pictures off of the adjacent wall where our two suites attach. And yes, that wall was the same wall where the subwoofer was placed. From what I was told, I vibrated that wall so badly that almost all of her paintings, photos, trinkets or whatever vibrated and fell down.
So what's the moral of the story? This system is so loud it will piss even deaf people off......."
If you do get these, get audigy 2 zs with them.