Disagree with all the statements about Rock & Roll not benefiting from the best quality speakers that a listener can afford - assuming that the listener LIKES Rock & Roll, that is. We like it, and we like it loud, soft and in-between. We also like all other kinds of music (well, the wife has a negative 'reaction', shall we say? to opera and rap music).
Dunlavys (unmodified) are very dynamic and clean, but are not capable of reproducing a lot of detail, and so a lot of music in the midrange will sound 'hard' or 'cold', the bass will lack definition, and the harmonics will be blanched (we lived with the IVs for 3 years).
Here is where something like the Revels excell and the midrange notes will have much more texture, be more involving and realistic, and will be less likely to cause ear bleed. The Revels, to their slight detriment, are also designed to be the tinest bit laid back at certain frequencies, presumably in order to cure that 'brightness' problem many rooms posess.
The Avantgardes would be an interesting solution - though their integration with their woofer is suspect - more so in the less expensive models and like foreverhifi said above, they are very directional.
B&W Nautiluses (Nautili?) are another possibility, if you do not point them directly at your ears as they are somewhat directional with those streamlined tweeters.
The lower-priced Rockports might also be an option - being most like the Dunlavys in that they do not emphasize or deemphasize various sonic signatures but are able to render the details that the Dunlavys are not.
Another option is the Acapella Violins (which we sell), being similar to the Rockports in their honesty but being more smooth and rich but having a little less slam at the bottom end (less so as you move up to the Violon High Subs).
Oh, the Wilson Watt/Puppy 7s (or Sophias) are another option. It seems like they have fixed all the major problems and the minor ones (and everything has minor problems) might be that they are a little on the cold side, and still perhaps retain a little of that Wilson brightness?
All these speakers, imho, will be way, way better than the NHT 3.3s - especially given the size of your room - and all of them will rock out. None of them are bad choices. You are in for a treat!
-Mike.