Hi members
I'm planning to buy a LED TV or a Plasma TV and below are my expectations kindly suggest me a best model available in market today
Based on the requirement that you stated below, here are my specific recommendations ...
1.My room size is 4.8 meters*4.8 meters (L*B)
You have not specified the exact viewing distance. I am assuming this to be 12+ feet since your room size is 4.8m x 4.8m. At this distance a 40"+ size is recommended, the greater the better. Even 55" is good but then it will go over budget. I am assuming that budget is flexible up to 110K if the TV quality is justified. Preliminary choice of model can be narrowed down to:
Sony: 46EX650, 46HX750, 40HX850, 46HX850
Panasonic: 50ST50, 42GT50
Samsung: 46ES6200, 46ES6800, etc.
LG: 46LM6200, 42LM6690, 47LM6700, etc.
You have not mentioned whether your room is brightly lit or whether the light can be controlled via heavy drapes. If the room is brightly lit and ambient light cannot be reduced, rule out plasma. Out of the above you should consider LG if you care about 3D a lot. LG with its passive 3D wins. But LG is not the best when it comes to picture quality. For all serious PQ considerations, it will be a fight between Sony and Panasonic. But your requirements do not justify extreme PQ oriented model. More below.
2.Regular use of TV would be for my Reliance Digital TV(Not HD set top Box as of now, may be in future) & Video chat via Skype
You should switch to HD DTH for best enjoyment of your TV. Whatever TV you will buy, you will need the Skype camera attachment for VC and it (camera) is costly around 6k to 8k. You will have to buy it separately. I will not recommend this but that is your choice.
3.Monthly once or twice watching HD,3D movies from external hard drive (No PC at my home )
Sony is a slight laggard when it comes to media connectivity. It has problems with NTFS and you must format HDD in ext32 FAT. Also there are some issue regarding mkv playback. There is a "how-to" article by lake1988 on this.
4.Should support online video streaming such as Flash contents
YouTube is supported on all models mentioned. Flash is also supported as far as I believe. But I am not into these things and do not care for online video streaming at all. Please verify yourself and with others.
5.Life of the TV should last at-least 3 years
Nothing is guaranteed. TV may last one year or fifteen years.
I can compromise on price if a TV meets all my above expectations.
Also please say me whether the following TV's are meeting the above expectations
1.SONY KDL40HX850
2.SAMSUNG UA40ES6800
I will state that your requirements do not justify extremely high PQ oriented TVs. I say this because you do not watch pure 1080p HD stuff. So basically, if you buy Sony HX850 or Panasonic ST50 you will have bragging rights but will have spent too much money. You can save the money and buy a higher size model such as Samsung 46ES6800. But then ST50 (if at all available) is just around 1 Lakh while 46HX850 will be 1.18 Lakh or so. What I would recommend to you are either 46EX650 or 46HX750.