I've listened at length to a close friends Levinson system with NHT 3.3's. Just some surface impressions, for what they are worth: They are large and require some breathing room. They produce some of the lowest, most refined bass I've heard from a pair of floorstanders. According to my friend they do require some muscle to make them sing. They are remakably detailed, and in his room and with his system produce a bigger-than-life sound to my ears. I have only listened for a few hours at a time but did not experience any listening fatigue. Even with his SS system I did not find them harsh in any part of the range. HUGE soundstage, improved further with a tube preamp (we did some swapping out of components on one occasion). Did I mention they are large? Nice finish. I've heard of some complaining about the footing being too narrow and inadequate for the size and mass of the speakers but I haven't moved them around to comment. My friend does prefer his right up against the back wall.
Marco
Marco