I'm currently running a 9837 on my Viper, 1" Predator, fully clipped. I trail ride in Northern Ontario. I'm very pleased with this track, no loss of top end, good fuel economy, corners great on groomed trails, night and day difference over stock track. It's a couple of pounds heavier than the stock Viper track.
The Predators are great tracks, 1" or 1.25, 3rd window closed or fully clipped. The RipSaw is also a great track. If you're strictly trail riding I'd lean towards the 1" Predator or the RipSaw. If you do a little more powder riding then go with the 1.25 Predator. You won't be disappointed with any of them.