@NJB You haven't defined the room where you are going to put your new speakers and receiver, so I made some educated guesses using
SPL Calculator (check it out)
If you have a smartphone, there are free Apps that measure SPL (Sound Pressure Level) close enough for figuring things out. Try one out on your existing system to see where you normally listen to music, TV, etc.
On the SPL Site I assumed only a pair of the ELACs, a couple feet away from a wall, and your primary listening position 8 feet away from them. At 75 watts you'd get 102 dB Sound Pressure Level which is just beyond "uncomfortable loud" and according to OSHA to avoid hearing damage you need to limit your exposure to this level to 1.5 hours. Most folks listen far below that level so the Denon AVR-S760H will be just fine.
If I was trying to stick to a budget, the ELACs & the Denon together are a Deal that you will have trouble beating, if at all. I wouldn't let them pass at that price.
I hope this is helpful. Merry Christmas.