On the negative side, there high frequencies are a bit sandy and grainy sounding and the midrange can sometimes bite or honk. All of the Alon models tended to suffer from these same colorations. Your choice of partnering electronics and wire can tame these to an extent but never eliminate them.
The Alon's are not as neutral or accurate as the Vandersteen's. If the Vandersteen's are lacking bass then something is wrong.
Without criticizing the Alon's, what Davemitchell wrote is why my post (top of this thread) voted in favor of Vandy's. I will always favor a speaker that allows me to listen comfortably long term and to a wide variety of music.
Anything less means I don't get to enjoy my entire music library and frankly that's the only reason to own a system in the first place.