DRS - DO we really need hifi technologies?

[urbestfriend]

1) Given out LBW for an inside edge - A normal visual feed is enough to determine this, we can always see if there is a deviation etc - No, not enough. Deviation is too slight some times, and some times there is deviation without a nick. 2) Given out LBW when pitched on leg stump / Impact is out side the kine of stumps : Third umpire can overturn only if strike zone suggests umpire is wrong, and go with umpire if some part of the ball is in line with the stump or impact. - Yeah! 3) Not given out for a plumb LBW decision: Here third umpire can use visual feed to determine if this was hitting the middle and off/ middle and leg. If there are some doubt, third umpire can go with on-field umpire - No, balls bouncing over the stumps are notoriously difficult to judge. 4) Given out caught when not hit: Easily TV visual feed is enough to determine the same - Once again no, deviations can occur without nicks. 5) Given not out when batsman has hit: A TV visual/sound from stumps mic is enough to make a decision. -????

Howler is to me is something everyone one watching thinks umpire made wrong decision, not those decisions which could have gone either way. As far as getting difficult 100% right, hotspot and Hawkeye are error prone and we should use DRS to overturn howlers.