I recently pulled the trigger and got three AON 3's for my fronts/center and later move them to the back when I get (if they are as good as reviewed from the show) the Triton Sevens.
The only other game in town of a similar nature were the Def Tech Studio Monitors. The SM 45 was a very tight impressive small speaker with good presence, image was reasonable but would serve better as a rear or side on axis speaker while the SM 55 was a bit more full sounding but didn't seem as "tight" and clear in the mid-high. The SM 65 is a beast and that is what I compared to the AON 3.
While I actually prefer the shape of the SM 65 over the AON 3, it was the tweeters that drove me to the AON 3. It is hard to describe but seemed to make my ears (for lack of better words) happier with a clear, faithful and honest expression of various high end sounds ranging from triangles to piano and more. The SM 65 in some respects might be a more honest speaker when it comes to matching music as well as does better for movies. The trade off that came with the AON 3 was the lack of a center speaker that goes below 120 for crossover and thus the 3rd AON. The Def Techs offer multiple center speakers and of course the SM 65 can be put on its side as indicated by Def Tech and in various forums.
Given that my speakers will be put on shelves or wall mounted, I am okay with an AON 3 as a center channel. The speaker is 14" tall and should not be placed on its side.
My tests included 96/24 flac music, lossless apple from CD, 3 movie scenes including Matrix, Chronicles of Narnia TLWandW and LOTR II Towers. Dialogue, shattering sounds (Matrix), music and effects (Narnia), bass and more - LOTR.
The AON 3 did well in all my personal tests and for fun they allowed me to airplay some music and that was the biggest surprise at just how nicely AONs can play those. I do admit that part of the great sound of course is their amplification system but just shows the best you can get out of these stand speakers. I can honestly say that cost wise, the AON 3 and 2 are good investments for those that like dependable moderate to high fidelity sound. The SM 65 perhaps is more versatile if you are more into edgy music played louder or hard rock. I listen to every kind of music and the AON 3 hits the sweet spot.