I am not sure what your budget is, but if it is up to $5K you might want to look at the Modwright KWA150. I have heard and read nothing but great things about it, and it sounds like it might be a match made in heaven for the HT3. I know that Funkmonkey uses a Parasound that he really enjoys with his HT3s....
I use four channels of a Parasound Halo A-51, in a passive bi-amp configuration to drive my HT3s. It's the only amp I have used on them and have no complaints, but also nothing to compare it to. From all that I have read the JC-1's are even better performers, but I wanted a 5 channel (well at least three) amp so I could drive the front three speakers in my combined 2-channel/HT set-up.
I've heard some great things about the Modwright KWA-150 as well. Even though I initially balked at the wattage rating, I think that amp (or two as mono-blocks) could be a great combination with the HT3s. But, pricey.
The McCormack DNA-500 was top of my list before I got the Halo, after much research. If I was able to separate my HT from my 2 channel rig I would pick one of these up (used) or try to get a demo Modwright for the 2 channel, and keep the Halo for the HT.
I have also heard the HT3s driven by a 140watt/ch Yamaha AVR and they sounded good enough to sell me on the speakers. So, like others have said already, it is going to get down to your personal preference; in your room; with your pre-amp and source equipment.
Best of luck to you, I am sure no matter what amp you choose (with enough power) the HT3s are going to sound great.