Let's see:
Image B6 Mains - 89dB sensitivity / 6 ohms nominal impedance w 4 Ohm dips / 150 Watts RMS power handling
Image C5 Center - 88dB sensitivity / 6 ohms nominal impedance w 4 Ohm dips / 150 Watts RMS power handling
Image B4 Surrounds - 85dB sensitivity / 6 ohms nominal impedance w 4 Ohm dips / 60 Watts RMS power handling
So what you want is a robust, stable power amp section; the fronts are fairly sensitive and the rears aren't going to be drawing too much current unless you're listening to 5ch music.
Any decent 7-channel receiver rated at 80+wpc into stereo will be more than sufficient
But if you really wanna go all out without breaking the bank, an Emotiva UPA-5 for example would be more than sufficient for this at its current sale price of 400 dollars, if you're interested in having a separate amp and processor. That's probably ~140wpc into 6 ohms into all 5 channels.
More importantly - what do you want out of your receiver - usability, auto-calibration etc. That's where most differences are.