I have, and I found they sounded OK to me, though my hearing isn't as hifi as it used to be. I used them in room 12x18ft carpeted. i had to use them fairly close to a wall but away from corners. I used them with the volume control around the 9 O'Clock position. To be honest any higher and they became somewhat tiring to listen to. Not sure if that's the amp though, as I find the same with my old Heybrook HB2's that I now have connected to the Marantz.
The Aviano's are now in the spare room on my old A&R A60, and I feel they perform very similarly with it as they did with the Marantz.
I'm wondering if I should try some KEF Q100 or 300 with the Marantz as they seemed to get recommended.
If you are listening off axis as I do quite often, then the Mordaunts don't seem to do well in that area.