Definitely the Quad current dumping amps.
These 7 Quad 909s power my 7.1 HT system.
I use one for my downstairs system with a 405 II powering the subs, and I use one to power the top end of the right and left mains of the system at out Eagan house with 405 IIs power the bass sections and the center.
I love these amps. They are powerful and silky smooth.