One more nod of approval for Hafler amps
I know several people who have older Haflers, either the DH200 or the DH220. They were originally very good when they were new, and many are on the used market, usually at a bargain price. This is true for any of the older Hafler amps, made when David Hafler owned the company. They are said to be very stable amps when driving low impedance speakers.
Yes, you should definitely try this amp on your main speakers.
For what it's worth, one the guys on the original Hafler design team, Frank Van Alstine, is still around and in business with his own line of amplifiers, preamps, and other electronics. See
Audio by Van Alstine. His products are generally said to be excellent. I've only heard one of his solid state amps, and I have to agree with the general opinion.
Van Alstine does
refurbish older Hafler amps. The price is not low, but if you ever need repairs, that would be the best place to go.