Two Outlaw 2200 monoblocks would do a fine job.
http://www.outlawaudio.com/products/2200.html
Note, they sell for $400 each, but discount to $720 for two.
They are Class AB amps and made in the same manufacturing facility that makes Parasound.
Honestly, with efficient Klipsch speakers, your AVR is probably plenty of power, but the 200WRMS (8ohm) and 300WRMS (4ohm) of the 2200 is certainly much more than you would ever use!
...and this Parasound offers a bit more power (that you'd never use with the Klipsch's) at $1000:
https://www.audioadvisor.com/prodinfo.asp?number=PAC2250V2