I have a rx-v4600. It handles the load fine. ALthough I do have the internal fan on all the time and my amp is not inside a cabinet and in it's own large closet. Heat is just not an issue for me even after 6 hours or so.

I do not think I would recommend the 1500 for the 80's. It would make a good preamp though and get an power amp to do the 80's.

2xAA
M80/VP150/VP160/QS8
4xM3/M22OW/M2OW/VP150OW/4xM3IC/4xM3OW
EP500/800/HSU VTF3/SVS PB2k/SB2k/SB-12