If you had to buy a new TV would get a plasma or an LCD TV?

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I have a picture tube type of Tv at present. It is working alright but I was thinking of buying a TV which will occupy less space. i woudl like to hang th eTV on the wall. Which willbe a better TV and what is th emain difference between a plasma and a LCD TV? Which will last longer and give a better output? Which is easier on teh eye an dmore economical on power consumption?