There are a lot of good brand 3D Tvs available in the market right now. The foremost thing which you have to differentiate is the type of glasses which you will be going for.
When it comes to the glasses in 3D TVs, They are two types of the same.
a) Active glasses :- Active glasses have batteries installed in them which makes them quite heavier. Also Some people do claim to get headache after watching it for few minutes but It can be said to differ from time to time.
b)Passive Glasses :- Passive glasses are light weighted as they don't have any batteries in them. They are said to flicker free and also don't have any health related issues as well.
Hope It helps you.