Finally got around to checking out Tsintsadze, and from my perspective, a widely mixed bag. His orchestral works (particularly the cello concerti) can be compelling in places, especially the slow movements, but much of his orchestral work is jagged.
That being said, the string quartets are simply amazing, particularly the first three. Think early Bartok, which in turn, reminds me of the late Beethoven quartets. Great, great stuff. Also, the miniatures for string quartet are quite lovely. Almost all of them are available (sound varies from good to poor) on the georgian music website:
http://www.georgian-music.com/free_music/classic.php