Buckeye:
I'm going to have to politely disagree with your above post. In his top two music choices, he listed "acoustic." For that he certainly needs a clear, accurate, detailed speaker, not just something that can pump and thump. Granted, with classic rock, rap, and alternative also on the list, a fairly dynamic and forgiving speaker will be needed in order to present the correct amount of impact and to take it easy on the bad recordings.
I recommended the Energys because they serve well for acoustic music and they have a very sweet sound that will do well to forgive the harsh recordings from many alternative, rock, and rap sources. With a subwoofer, you should get all the impact you need.
If a horn type, efficient speaker is what you desire after looking, I'd probably choose something from the Klipsch Reference series. They'll still do well with acoustic and be more explosive. Also, the Athena aren't horn tweeters, but they do offer a high sensitivity and (the AS-F2s) will produce a very full sound.