Thanks for the replies everyone. Interesting point about the engines. The 737 also has quite a high flight idle because of spool up times of around 32%N1. This reduces to 22% 4 secs after t/down to allow rapid accel. in reverse (another reason for getting the thrust levers closed and reverse selected early).
It's interesting that several people seem to pick their own app. speeds. On the 737 it is very specific at Vref + 1/2 the steady h/wind componant + all the gust, with a min of Vref+5, and max of Vref+20.
eg) 14kts = +7, 14G20 = 7+6=Vref+13
However, whilst the gust correction should be maintained to t/down, the steady wind correction should be bled off as the a/c approaches touchdown. Therefore, if the wind is less than 10kts, you should approach at vref+5, touching down at Vref. Clearly this cannot be achieved unless the thrust is gradually reduced on crossing the t/hold.
Interesting that Scando says you run out of elevator on the MD80 if you close the thrust levers at 50'. On most other a/c (Boeing / Airbus) you will scrape the tail long before that! If sink develops you can't haul back beyond 10 degrees so I guess you have to add thrust.