For less then $600, I'd be curious as to how a Yamaha P3500 would do for the HT3's or something a bit more demanding then my Non full range SS bookshelf speakers...
The Fans rarely, if ever come on with these P Series amps...
P3500s
Watts/Side @ 8 ohms 390W
Watts/Side @ 4 ohms 590W
I've experienced a P7000s bridged at 4ohms pushing 4200w in the chain running an 18" TC-Sounds LMS driver and its nothing but spectacular and accurate, with the large and not the most efficient moving mass of that cone. Obviously its a sub and not a full range speaker, but they are still extremely great quality amps and I'd be curious how they sounded to people...
Plus it sure wouldn't cost all that much to try on the speakers - nothing like the $2-3K investing in some of these boutique amps