I use a Pioneer Elite avr for my RF 7 system. I have a Yamaha M 80 and Carver M 400 for the mains and center respectively. As others have said you may or may not need any external amplification. With music, even playing very loud, you will rarely exceed 40 watt. Movies in a HT setup will require more than 40 watts. I have seen the meter on my main go as high as 180 watt at reference level will is not a normal enjoyable level. My Pioneer avr can swing around 270 watts for movie dynamic. I may not need my amp but, they are for keeps.
The nice thing about the Pioneer/Yamaha/Carver combo is that it is dead quiet with a nice black floor for music.
Klipsch RF 7 based HT 7.4, Pioneer SC 35, Acurus 200 Five, Dayton 18 Ultimxa Dual Sub Cab(2), Dayton 18 Ultimax Large Vented Sub Cab (2), on Berhinger I Nuke DPS amps, Samsung BDP F 7500, Asus/My Book Live HPC 4 TB
Yaquin VK 2100 amp, McIntosh XR 5 speakers, Samsung BDP F 7500