My list (in no order):
Klipsch La Scala
Klipsch Cornwall
AR-3a
Bozak 302a
New Large Advent 5012/w
Magnepan MG-1c
Those are the top ones, and I have owned about 50 pair of speakers of all sorts in the past two years. These (with the exception of the MGs and Advents) are the ones I kept.
They all sound different, I think the "popularity" of one oner the other is mass appeal, some hype. The AR-3a is supposed, by many, to be "the one", and I have to say it is an excellent speaker.