No maker can guarantee reliability so they give you a warranty to cover the first part of the bath tub curve ( read https://en.wikipedia.org/wiki/Bathtub_curve ).
Since all makers have no way to stop this, you can't do much other than keep it in warranty for as long as it must work. Here I just went cheap last time and if I get 2 years, I'm golden.
I'm planning to buy a 40-43 inch LED TV. My budget is RS. 25000. So, as per my review I have shortlisted TCL L40D2900, Sanyo XT-43S7100F and VU 40D6575. Sansui SKY40FB11FA. The price in India is 21000, 25000, 23000 and 27000 respectively. Please suggest me your opinion on which one is better. Which is good brand among these. My requirements are Basic Full HD LED TV which can be reliable