You have recieved great advice on all aspects. I just wanted to chime in and say if $$ are not a problem i would go with the qs8 you will not regret it. having said that also keep in mind that if you order the qs4's and decide they are not enough for you in the first 30 days axiom will upgrade you for just the difference in the speaker price (it will not cost you shipping in either direction).so it is a win win.
Jake

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Leave the gun, Take the canolis.