Jose,
I'm VERY satisfied with the NHT 3.3's. I purchased them as dealer demos for $2000, with full warranty. I've had no problems with them. I *thought* I had a bad lower-midrange, and contacted NHT. They just asked for the serial numbers, and sent me a new pair of mids. The "chuffing" sound I was hearing was being produced by the preamp, so the midranges are still new in the box.
They're the most unforgiving speakers I've ever owned. They really shine with a good recording, and great electronics. But bad recordings sound extra-bad, and bad equipment--- even worse! They sounded their best when I was just using them for music. I had a Sunfire 300 stereo amp (bi-wired via the current and voltage outputs of the Sunfire), and was using a Balanced Audio Technologies BAT VK-3i preamp. Sweeeeeeet.
But I moved back into home theater, and can't seem to capture that same magic. But I'm not disappointed. I enjoy movies more than ever. And music is just a tad less intoxicating as with the aforementioned combo.
Enjoy!