Nobby Nic's are the 'in' tyre at the moment because they are pretty good allrounders but...
I have used Panarcer Cinders for 3 years now and they are fantastic.
I always have a Cinder upfront and then swap to a Panaracer Trailraker at the back in the muddy heart of winter, a Cinder during Spring and a Raxer MX when the trais are dusty...
They have a sticky central compound which makes the Cinders pretty grippy over roots and stuff.
On my single speed I just have two Cinders and they are great!