Metcalf
Expedition Leader
There a major down side to having a winch with a lot of cable and that is the winch has to work harder if you are only using the top couple of layers because the maximum pulling power of a winch is "Only" available when you are down to the last layer hence why a lot of people buy a winch that is a lot bigger than they need, If you have a winch with a 150ft of cable on it and you are only using the top two layers then your winch only has half the pulling power that it is rated at.
Due to all of the above it is better to own/buy a winch that has less cable on it, because you still get use it's Full pulling power which in turn puts less strain on the Winch.
If you run synthetic line you can 'hitch' the line to get more off the drum if needed to get down to the lower layers very easily ( if you don't want to double line )
I agree that having a TON of line on the winch can cause issues, but not having enough line can be just as big of a headache.
When I convert a winch to synthetic I usually split the difference. On my 8274 and belleview upright winches which have a stock steel cable capacity of 150', I run 90-120 feet of synthetic line. This still lets me reach out fairly far before I have to add an extension. It also helps limit the amount of cable on the drum a little when you need to pull sideways or use the winch for something up close.