I bought a Toshiba 55" LCD(55HT1U) back in Feb. 2011(6 months ago) and am undecided if I should buy an ext. warranty or not? I was thinking of Mack or Warrantech. If yes, which company do you recommend, and should I buy a 3 year or 5 year plan? I could get either plan for less than $100. The TV cost $899. Thanks.