Yep, they are all 4 Ohm and sensitivity is not low, but not high either, so they will likely enjoy plenty of power.
I went this route first, had a Marantz next to top tier model but I had all 4 Ohm speakers at that time and I could hear it compress at higher SPL so I added the amp. That made a big difference. When the AVR was about 10, I replaced it with a prepro, but could have just as easily gone with an AVR. At the time, I got the Pre for less than a flagship AVR though, when multiple companies were trying to do separates, but most seem to have given that up.