Nothing wrong with suspension per se, it is often done in otherwise difficult
situations.
The key is to suspend them in such a way that the speakers can't
swing backwards and forwards, and that the suspension cords don't resonate and 'sing'. You
may find that isolating the speakers on foam pads above the suspended base plate helps the
latter, and angling the suspension strings to remove any possibility of swing helps the
former.
hugh
-------------------- Technical Editor, Sound On Sound