After using the Amish Outfitters clippers this spring i really liked them for flatlining mono.
http://www.amishoutfitters.com/catalog.htm
Laurvicks work well for mono too but their downfall is on a windy day the tend to tangle easily. But for leadcore and coppers (300' or less) Laurvicks work well for me.
Scotty pinch pads are also great. They just tend to be pricy when you need 10-20 of them in a day.