my onkyo txsr700 has been driving my axiom 80`s for 6yrs+ now, no trouble. it does get very hot ( fry an egg hot) no fan added but in an open audio rack...my room is 20` by 30` and have had it @ over 90% on many occasions....on good recordings distortion is very audible @93-95%(have not gone beyond),but i still crank it up for a song or two @ these levels once in awhile..my reference level is 65-75% but has been on for 4-6hrs straight in mid 80`s on several occasions,also no trouble...
on that note still have decided on my new avr yet looking @ denon 3310 or 3308(refurb)


denon 991 /M80's /vp150 & 180 /4x QS8's
Velodyne 15"/ Dbox 12"
ps4 benq w1070 -grand view 106" FF