Well, I've run a mix of M80s (4 ohms), QS8s/4s (ie 6 and 8 ohms) and a VP100 (8 ohms) on a midrange Harman/Kardon for 10 years or so without it melting.

Also, I've read LOT of these questions and answers. If'n you don't want advice from random people, don't ask...

I am the Doctor, and THIS... is my SPOON!