Hi. The Klipsch speakers are very popular for their distinctive sound.Have you heard the speakers to see if you could live with them.It's very important to know because all speakers sound different (not necessarily good or bad only different) In general ,Klipsch have a fairly bright sound due to the use of a horn tweeter and sometimes a midrange horn .The bass can be average or deep depending on the model..
Loudspeakers that originate from Great Brittain usually have a more smoother sound with no emphasis on any particular frequency range (Treble Midrange Bass in equal amounts. )Such speakers are known as neutral or low coloration. But again you have to hear them to make up your mind.
I think Onkyo make better amps than Sony
The Onkyo TX -SR674 7.1Surround Sound Receiver for about $799 (rec.ret. price) will surpass your Sony for half the price.
Also NAD make superb sounding receivers with a lush warm valve like sound. They are designed in England and assembled in the East to strict specifications.They are more expensive than other receivers because of the detail of the sound they produce.
Their top model is the NAD T 773 . 7.1 Channel Receiver .The price is about $1500
Hear are the specifications for the the Onkyo:
http://www.bigpicturebigsound.com/printer_onkyo-txsr674-1099.shtml
Here are the specifications for the NAD ;
http://nadelectronics.com/products/av-receivers/T773-A/V-Receiver
Hear is a list of KEF speakers in case you decide to listen to them before buying the Klipsch.Available in Black or Walnut
These are British designs with the characteristic neutral sound.
KEF AUDIO iQ9 floorstanding speakers front.
http://www.vanns.com/shop/servlet/item/details/542600990
KEF AUDIO iQ 6C -3 center speaker
http://www.vanns.com/shop/servlet/item/details/548500304
KEF AUDIO PSW 2150 subwoofer
http://www.vanns.com/shop/servlet/item/details/549600327
KEF AUDIO IQ8DS rear speakers
http://www.vanns.com/shop/servlet/item/details/548599997
I hope i have given you some ideas to ponder over and i hope you get a really great system.!
Cheers.(from" Down Under")