Forum Moderators: phranque
Google Groups is a great resource for guaging the "public opinion" on various suppliers.
Search Google Groups (http://groups.google.com/) for any of the suppliers you are considering and read a few posts to get a feel for their service.
If there's nothing in Groups, then they are probably a new outfit so it's the usual buyer beware. Check for real contact details - give them a ring and see how they answer the phone etc..