Where can I get users' 3D TV reviews and which one is the best 3D TV right now?

You can get users' reviews on 3D TVs on retailer sites (consumer review/ratings) or forums. Some retailers like Bestbuy has its own forum.

Be aware than some manufacturers, LG for example, are known to flood such sites with positive comments about their own products. WikiAnswers has had hundreds of such positive reports on LG 3D television placed in co-ordinated campaigns to promote the products.

Better by far to go and experience the different models and brands. Believe your own eyes before you believe the claims of other people.