Save your money and Go to Accessories4less (if you are in the US) and buy something like a Denon AVR-750H for $400. Connect to the two L&R Front Speakers, and the L&R Surround speakers. Set the receiver Multichannel Stereo. Even though your speakers are rated at 35 Watts RMS they are quite efficient (like almost all Klipsch) with a sensitivity of 91 dB. With the rest of your budget you should think of adding a Sub as the bottom end will probably be quite lacking.
PS - Make sure you've got good ventilation in your closet!
I hope this is helpful.