There's a review of the Astrion posted over at the Vinyl Engine Forum (you may need to sign up to view):
http://www.vinylengine.com/phpBB2/viewtopic.php?t=4180
or try this:
http://downloads.nakedresource.com/d...ion_review.pdf

The review (Stereo Review) is favorable, mentioning a flat response and neutral sound.

Never had an Astrion but I liked the packaging on the ZLM, a metallic cone shaped thing that looked like a piece of space hardware.