another vote for the wahl, i use the pet pro clippers which can be chanrged or used off the mains, so quiet my mare that climbs the walls when normal clippers are switched on a few stables down from her stood like a lamb to be clipped!
I bought the Wahl Moser Avalon clippers new two years ago, and I can't rate them highly enough. They're battery operated and quiet and easy to use and I didn't get tracks either so must be good!