Welcome to the forum!
Those RF-82 speakers have a listed sensitivity of 98dB @ 2.83V / 1m. That's pretty darn high, and what it means is that it won't take a whole lot of power to play them loud. They are also listed as being 8 ohm compatible for their impedance, so you won't need a receiver that is 4-ohm rated.
How loud do you typically listen to music, and how close do you plan to be to your speakers? Are these for parties, or just for a smaller group of people?