Ok i read every ones post and i can gather from the debate, that some folk dont wish the ump. role on the game to undermind or the game is fine as is.
one thing id like to point out when tv wasnt part of cricket the ump, had the best sit in the house to make a decision and every one trusted he did. when cricket first made its way onto tv something was picked "up" by the cameras (most importantly replays) that the naked eye (sq. leg ump) could not. this was the run out calls, once tv became part of cricket there was a new umpire, the camera!! run outs to this point is the only time this ump, is utilised. im sure you wouldnt fine many people who would say the run out camera (3rd ump.) have made the wrong decision.
edges, lbw a next in line the camera tech. has improved, from hawk eye, to snicko, and that new one channel 9 had hot spot i think.
furthermore why are the ump. worried about being over turned if they were so inflallible they should be saying "bring it on" .
Ump would also have a true record of their succes rate, wrong decision/ right decision ratio, therefore icc could use this info to have the top ump. in the important games, wc cup finals etc. and even playes/capt. can use this info on make the right decision whether to refer or not.